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/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')