fix(audit-trail): 3 production bugs found via end-to-end Anodize battle test

Battle-tested complete workflow on entech: ABC Manufacturing + Anodize
recipe (id=136) cloned to part-variant (id=1775) → SO S00276 confirmed →
fp.job 1234 with 17 steps → recorded 56 measurement values exercising all
13 input types (incl. all 4 new types) → CoC chronological report renders
69KB with all values incl. photo thumbnails.

Bugs found and fixed:

1. fp.process.node.input_ids missing copy=True — when a master recipe
   was cloned per-part (the standard variant pattern), the operator
   prompts on each step did NOT get copied to the variant. Result: jobs
   built from variants ran with zero prompts even though the master had
   them. Fixed: input_ids now copy=True so cloning auto-duplicates.

2. CoC chronological template read dest.input_ids where dest is
   fp.job.step. Steps don't carry input_ids — that field lives on the
   recipe node. Result: AttributeError aborted the entire CoC render.
   Fixed: walk via dest.recipe_node_id.input_ids; preserves the existing
   collect=True filter.

3. CoC chronological template used hasattr() in a t-value expression.
   QWeb's expression engine doesn't expose Python builtins, raised
   KeyError: 'hasattr'. Fixed: use 'collect' in i._fields instead.

Also enhanced photo rendering in CoC: was just "[Attachment]" placeholder;
now renders an actual <img> thumbnail (max 80px tall) plus the filename.

Battle-test script saved to fusion_plating/scripts/bt_e2e_anodize_v2.py
for re-runs / regression testing.

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

fusion_plating/fusion_plating/models/fp_process_node.py

@@ -292,6 +292,7 @@ class FpProcessNode(models.Model):
         'fusion.plating.process.node.input',
         'node_id',
         string='Operator Inputs',
+        copy=True,
     )
 
     # ===== Sub 12a — Simple Editor + Step Library extensions =================