feat(fusion_plating_jobs): auto-pause cron for stale in-progress steps

Plan tasks P2.4 + P2.5 batched.

Adds _cron_autopause_stale_steps method on fp.job.step + 30-min cron
registration. Flips in_progress steps idle > threshold to paused with
a chatter audit ("Auto-paused after Nh idle. Resume from the tablet
when work continues.").

Threshold from ir.config_parameter:
    fp.shopfloor.autopause_threshold_hours  (default 8.0)

Recipe nodes opt out via fusion.plating.process.node.long_running
(added in P2.1) — useful for 24h bakes and multi-shift soaks.

Fixes the 411-hour ghost timer that motivated the redesign. Doesn't
replace the existing nudge crons — those still notify the supervisor;
this one actually pauses the timer.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_jobs/data/fp_cron_data.xml

@@ -31,4 +31,21 @@
         <field name="interval_type">hours</field>
         <field name="active" eval="True"/>
     </record>
+
+    <!-- Phase 2 tablet redesign — actual auto-pause (not just nudge).
+         Flips in_progress steps idle > N hours to paused with chatter
+         audit. Threshold configurable via ir.config_parameter
+         `fp.shopfloor.autopause_threshold_hours` (default 8.0). Recipe
+         nodes can opt out via long_running=True (e.g. 24h bakes). -->
+    <record id="ir_cron_autopause_stale_steps" model="ir.cron">
+        <field name="name">Fusion Plating: Auto-pause stale in-progress steps</field>
+        <field name="model_id" ref="fusion_plating.model_fp_job_step"/>
+        <field name="state">code</field>
+        <field name="code">model._cron_autopause_stale_steps()</field>
+        <field name="interval_number">30</field>
+        <field name="interval_type">minutes</field>
+        <field name="numbercall">-1</field>
+        <field name="doall" eval="False"/>
+        <field name="active" eval="True"/>
+    </record>
 </odoo>

fusion_plating/fusion_plating_jobs/models/fp_job_step.py

@@ -151,6 +151,62 @@ class FpJobStep(models.Model):
             step.blocker_jump_target_model = False
             step.blocker_jump_target_id = 0
 
+    # ==================================================================
+    # Shop-Floor auto-pause cron (Phase 2 — tablet redesign)
+    # ==================================================================
+    @api.model
+    def _cron_autopause_stale_steps(self):
+        """Flip in_progress steps idle > threshold to paused.
+
+        Threshold read from ir.config_parameter
+            fp.shopfloor.autopause_threshold_hours  (default 8.0)
+
+        Recipes can opt out per node via
+            fusion.plating.process.node.long_running  (Phase 2 — P2.1)
+
+        Fixes the 411-hour ghost timer that bit us on the original tablet
+        when an operator started a step and never tapped Finish. Posts an
+        audit chatter entry on the step so the operator can see what
+        happened when they resume.
+        """
+        from datetime import timedelta
+        threshold = float(
+            self.env['ir.config_parameter'].sudo()
+            .get_param('fp.shopfloor.autopause_threshold_hours', 8)
+        )
+        deadline = fields.Datetime.now() - timedelta(hours=threshold)
+        domain = [
+            ('state', '=', 'in_progress'),
+            ('date_started', '<', deadline),
+            '|',
+                ('recipe_node_id', '=', False),
+                ('recipe_node_id.long_running', '=', False),
+        ]
+        stale = self.search(domain)
+        paused = 0
+        for step in stale:
+            try:
+                step.button_pause()
+                step.message_post(body=Markup(
+                    "<b>Auto-paused</b> after %.1fh idle. "
+                    "Resume from the tablet when work continues."
+                ) % threshold)
+                _logger.info(
+                    "Auto-paused step %s (%s) after %.1fh idle",
+                    step.id, step.name, threshold,
+                )
+                paused += 1
+            except Exception:
+                _logger.exception(
+                    "Auto-pause failed for step %s — skipping", step.id,
+                )
+        if paused:
+            _logger.info(
+                "_cron_autopause_stale_steps: paused %d step(s) "
+                "(threshold %.1fh)", paused, threshold,
+            )
+        return paused
+
     # NOTE: the actual button_start override lives further down (~line
     # 876) where it merges Sub 13 predecessor gate + Policy B Contract
     # Review auto-open + Sub 8 Racking auto-open + the receiving soft

fusion_plating/fusion_plating_jobs/tests/__init__.py

@@ -6,3 +6,4 @@ from . import test_display_wo_name
 from . import test_blocker_compute
 from . import test_late_risk_ratio
 from . import test_active_step_id
+from . import test_autopause_cron

fusion_plating/fusion_plating_jobs/tests/test_autopause_cron.py

@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+# Copyright 2026 Nexa Systems Inc. — License OPL-1
+"""Plan task P2.4 — _cron_autopause_stale_steps method."""
+from datetime import datetime, timedelta
+
+from odoo.tests.common import TransactionCase, tagged
+
+
+@tagged('-at_install', 'post_install', 'fp_jobs')
+class TestAutopauseCron(TransactionCase):
+
+    def setUp(self):
+        super().setUp()
+        self.partner = self.env['res.partner'].create({'name': 'AP'})
+        self.product = self.env['product.product'].create({'name': 'AP'})
+        self.job = self.env['fp.job'].create({
+            'name': 'WH/JOB/AP',
+            'partner_id': self.partner.id,
+            'product_id': self.product.id,
+            'qty': 1,
+        })
+
+    def test_stale_step_flips_to_paused(self):
+        step = self.env['fp.job.step'].create({
+            'job_id': self.job.id,
+            'name': 'Stale',
+            'sequence': 10,
+            'state': 'in_progress',
+            'date_started': datetime.now() - timedelta(hours=10),
+        })
+        paused = self.env['fp.job.step']._cron_autopause_stale_steps()
+        self.assertGreaterEqual(paused, 1)
+        step.invalidate_recordset(['state'])
+        self.assertEqual(step.state, 'paused')
+
+    def test_fresh_step_unchanged(self):
+        step = self.env['fp.job.step'].create({
+            'job_id': self.job.id,
+            'name': 'Fresh',
+            'sequence': 10,
+            'state': 'in_progress',
+            'date_started': datetime.now() - timedelta(hours=2),
+        })
+        self.env['fp.job.step']._cron_autopause_stale_steps()
+        step.invalidate_recordset(['state'])
+        self.assertEqual(step.state, 'in_progress')
+
+    def test_long_running_node_exempt(self):
+        node = self.env['fusion.plating.process.node'].create({
+            'name': 'Long bake',
+            'long_running': True,
+            'node_type': 'operation',
+        })
+        step = self.env['fp.job.step'].create({
+            'job_id': self.job.id,
+            'name': 'Long',
+            'sequence': 10,
+            'state': 'in_progress',
+            'date_started': datetime.now() - timedelta(hours=20),
+            'recipe_node_id': node.id,
+        })
+        self.env['fp.job.step']._cron_autopause_stale_steps()
+        step.invalidate_recordset(['state'])
+        self.assertEqual(step.state, 'in_progress')
+
+    def test_threshold_config_parameter_respected(self):
+        self.env['ir.config_parameter'].sudo().set_param(
+            'fp.shopfloor.autopause_threshold_hours', '24',
+        )
+        step = self.env['fp.job.step'].create({
+            'job_id': self.job.id,
+            'name': 'Within 24h',
+            'sequence': 10,
+            'state': 'in_progress',
+            'date_started': datetime.now() - timedelta(hours=10),
+        })
+        self.env['fp.job.step']._cron_autopause_stale_steps()
+        step.invalidate_recordset(['state'])
+        # 10h < 24h → still in_progress
+        self.assertEqual(step.state, 'in_progress')