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>