CC4: 3-subagent backend hardening done + CRM audit_log fix

Sub1 (commit eb1b49f): 4 v2 listing/discovery endpoints + SQL fix
Sub2: CRM 4 modula PASS (M7 članarine, M8 liječnički, M9 obrasci, dokumenti partial)
Sub3: ERP 4 modula GREEN — racuni/putni/placanja/xlsx, E2E demo flow (7 steps) PASS

Critical fix this commit:
- erp/audit_helper.py (centralni helper za audit_log writer)
- routers/clanarine_router.py: audit hook na POST /clanarine
- routers/lijecnicki_router.py: audit hook na POST /lijecnicki
- routers/obrasci_router.py: audit hook na POST /submissions + /submit

Verify: prije 0 / poslije 1 audit entry za POST /api/crm/clanarine
   "33|create|api|clan=4946 klub=2320 300.0€"

Outstanding (next round):
- /api/v2/dokumenti plain route shadowing with RAG
- /api/v2/dokumenti/upload missing
- SQL alias bug u pgz_sport_v2_router.py:3099

Reports:
  _audit/audit_CC4_FINAL.md  (konsolidirani)
  _audit/audit_CRM_VERIFIED.md
  _audit/audit_ERP_VERIFIED.md
  _audit/audit_ENDPOINTS_ADDED.md

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

_audit/audit_ENDPOINTS_ADDED.md

@@ -64,7 +64,9 @@ All read-only — middleware allows anonymous GETs on `/api/v2/*` listings.
 
 | Domain | Commit | Files |
 |---|---|---|
-| v2 listings + sport namespace | _(pending git commit at end of run)_ | pgz_sport_v2_router.py |
+| v2 listings + sport namespace + kategorizirani fix | `eb1b49f` | pgz_sport_v2_router.py |
+
+Pushed to `gitea/master` (4fc8327..eb1b49f).
 
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