feat(plating): Sub 8 — split receiving vs inspection + box parity

fp.receiving simplifies to box-count-only (new primary state
machine: draft → counted → staged → closed). Legacy
inspecting/accepted/discrepancy/resolved states stay in the
Selection so existing records load without error but are surfaced
behind a manager-only toggle. New box_count_in field + banner
that tells the receiver "count boxes only — parts are inspected
by the racking crew."

New fp.racking.inspection + fp.racking.inspection.line models —
one record per MO, auto-created by mrp.production.create() with
one line per contributing SO line (qty_expected seeded, qty_found
+ condition filled in by the racking crew when they open the boxes).
State: draft → inspecting → done | discrepancy_flagged (flagged
when any line has a non-ok condition or qty variance). Reopen
restricted to Plating Manager.

WO soft gate: first plating WO button_start raises a UserError
when the MO's racking inspection is still Draft or Inspecting.
Plating Manager bypasses; later WOs are not gated.

fp.delivery gains x_fc_box_count_out. action_mark_delivered calls
_fp_check_box_parity which posts a non-blocking chatter warning
when boxes out ≠ boxes in (resolved via job_ref → MO.origin → SO
→ receiving). Warning only — never blocks shipping.

Menu entry: Plating → Operations → Racking Inspection.

Module version bumps:
  fusion_plating_receiving  → 19.0.3.0.0
  fusion_plating_logistics  → 19.0.3.0.0
  fusion_plating_bridge_mrp → 19.0.12.0.0 (+depends receiving)

Smoke on entech: 12/12 assertions pass (one gate test skipped —
MO had no WOs to test) including box-count state machine, inspection
auto-create, lifecycle, discrepancy flag, and box-parity chatter.

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

fusion_plating/CLAUDE.md

@@ -373,7 +373,7 @@ rewrite code as new requirements surface. Each sub-project has its own design do
 | 5 | Order-line fields (fp.serial registry, auto job#, coating-scoped thickness dropdown, revision picker) | **Shipped 2026-04-22** | 5, 6, Q2 |
 | 6 | Contact Profiles & Communication Routing (per-contact flags + per-location routing + global contact; single resolver helper) | **Shipped 2026-04-22** | client transcript A/B/C |
 | 7 | IoT tuning (per-sensor polling interval + ingest rate-limit; entech seeded with 25 tanks / 50 sensors) | **Shipped 2026-04-22** | client transcript D |
-| 8 | Receiving / Inspection / QC flow restructure (split receiving vs inspection; racking crew inspects, not receiver) | Pending | client transcript E |
+| 8 | Receiving / Inspection / QC flow restructure (fp.receiving = box count only; new fp.racking.inspection per MO; WO soft gate; delivery box-parity warning) | **Shipped 2026-04-22** | client transcript E |
 | ∞ | First-off / last-off QC | Deferred | client transcript F |
 | ∞ | VEC machine auto-ingest (Word-format thickness report from network-connected XRF; different machine from Fischerscope) | Deferred | client transcript G |