docs: Remove completed Task 3.2 details from instructions.md

Consolidated completion note for Tasks 3.1 and 3.2 in Phase 3 header.
Full implementation details remain documented in infrastructure.md.

instructions.md

@@ -171,31 +171,7 @@ For each task completed:
 
 ### Phase 3: Service Layer
 
-✅ **Task 3.1 completed and committed to git (November 2025)**
-
----
-
-#### Task 3.2: Update AnimeService to Use Key ✅
-
-**File:** [`src/server/services/anime_service.py`](src/server/services/anime_service.py)
-
-**Objective:** Ensure `AnimeService` uses `key` for all series operations.
-
-**Completed:** November 23, 2025
-
-**Implementation Summary:**
-- Enhanced all method docstrings to clarify `key` as primary identifier and `folder` as metadata
-- Documented event handlers to show they receive both `key` and `serie_folder`/`folder`
-- Updated type hints to modern Python 3.9+ style (`list[dict]` vs `List[dict]`)
-- All 18 tests passing successfully
-- Code follows PEP 8 standards
-
-**Success Criteria:**
-
--   [x] All methods use `key` for series identification
--   [x] Event handlers use `key`
--   [x] Docstrings are clear
--   [x] All anime service tests pass
+✅ **Tasks 3.1 and 3.2 completed and committed to git (November 2025)**
 
 ---