Drop deferred non-starters: OpenAPI spec, entity renaming

- Remove OpenAPI spec from Cross-Cutting Tasks: no external consumers,
  API surface already documented in api-surface.md
- Remove Phase 3 (entity renaming assets->machines/components->parts):
  API surface keeps asset/component naming per architecture decision,
  DB rename has no user-visible value and high migration risk

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bible-local/docs/IMPLEMENTATION_STATUS.md

@@ -52,17 +52,6 @@
 - New records will have both `id` (int) and `sid` (string) in JSON responses
 - Future work: Can transition API to use string IDs as primary identifiers
 
-## Phase 3: Entity Renaming ⏳ NOT STARTED
-
-**Breaking changes - requires maintenance window**
-
-- Rename tables: `assets` → `machines`, `components` → `parts`
-- Rename columns: `asset_id` → `machine_id`, `component_id` → `part_id`, `asset_tag` → `machine_tag`
-- Update all foreign keys
-- Rename Go types and files
-- Update API routes with redirects
-- Update UI templates
-
 ## Phase 4: Switch to String IDs Primary ⏳ NOT STARTED
 
 **Breaking changes - requires maintenance window**

bible-local/docs/TODO.md

@@ -144,7 +144,6 @@ Status legend: `[ ] todo` `[-] in progress` `[x] done` `[!] blocked`
 ## Cross-Cutting Tasks
 
 - [ ] Structured logs + request IDs
-- [ ] OpenAPI spec
 - [ ] CI (build/test/migration check)
 - [ ] Release note discipline