feat(jobs): add fp.job._generate_steps_from_recipe (Task 2.4)

Native port of fusion_plating_bridge_mrp's
_generate_workorders_from_recipe method. Walks the recipe tree,
creates one fp.job.step per 'operation' node, formats child 'step'
nodes as step instructions on chatter, respects opt-in/out
overrides from fp.job.node.override.

Adaptations from the original:
- Creates fp.job.step (not mrp.workorder)
- Maps fusion.plating.work.center to fp.work.centre via forward
  link (x_fc_fp_work_centre_id) or code fallback
- Uses native field names (job_id, work_centre_id, etc.)
- Drops work_role_id (not on fp.job.step yet — Task 2.6+)
- Drops _fp_autofill_default_equipment (not yet on step)

5 new tests cover: basic generation, idempotency, no-recipe skip,
opt-in override behaviour, recipe_node_id link.

Manifest 19.0.1.2.0 → 19.0.1.3.0.

Part of: native job model migration (spec 2026-04-25)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_jobs/__manifest__.py

@@ -3,7 +3,7 @@
 # License OPL-1 (Odoo Proprietary License v1.0)
 {
     'name': 'Fusion Plating — Native Jobs',
-    'version': '19.0.1.2.0',
+    'version': '19.0.1.3.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Native plating job model — replaces mrp.production / mrp.workorder bridge.',
     'description': """