📝 docs(adr): audit and update Status for 5 implemented ADRs (#24)

5 ADRs status updated based on file:line evidence audit. 2 kept Proposed (production code absent, only test fixtures). Audit by Mistral Vibe ICM workspace, €2.50, ~95% autonomous.

Co-authored-by: Gabriel Radureau <arcodange@gmail.com>
Co-committed-by: Gabriel Radureau <arcodange@gmail.com>

adr/0018-user-management-auth-system.md

@@ -1,7 +1,7 @@
 # 18. User Management and Authentication System
 
 **Date:** 2026-04-06
-**Status:** Proposed
+**Status:** Partially Implemented
 **Authors:** Product Owner
 **Decision Drivers:** Security, User Personalization, Admin Functionality
 

adr/0019-postgresql-integration.md

@@ -1,7 +1,7 @@
 # 19. PostgreSQL Database Integration
 
 **Date:** 2026-04-07
-**Status:** Proposed
+**Status:** Partially Implemented
 **Authors:** Product Owner
 **Decision Drivers:** Data Persistence, Scalability, Production Readiness
 

adr/0022-rate-limiting-cache-strategy.md

@@ -1,6 +1,6 @@
 # ADR 0022: Rate Limiting and Cache Strategy
 
-**Status:** Proposed
+**Status:** Implemented (Phase 1) - Phase 2 still Proposed
 
 ## Context
 

adr/0024-bdd-test-organization-and-isolation.md

@@ -1,6 +1,6 @@
 # ADR 0024: BDD Test Organization and Isolation Strategy
 
-**Status:** Proposed
+**Status:** Partially Implemented
 
 ## Context
 

adr/0025-bdd-scenario-isolation-strategies.md

@@ -1,6 +1,6 @@
 # ADR 0025: BDD Scenario Isolation Strategies
 
-**Status:** Proposed
+**Status:** Partially Implemented
 
 ## Context