Revert IMPROVEMENTS-LOG.md changes — log is only for testing framework iterations, not SCOPE analysis

Co-authored-by: TheovanKraay <24420698+TheovanKraay@users.noreply.github.com>
Agent-Logs-Url: https://github.com/AzureCosmosDB/cosmosdb-agent-kit/sessions/69c25094-a8d0-43bf-ad2f-3a8ad83a331f

Author: Copilot

testing-v2/IMPROVEMENTS-LOG.md

@@ -18,22 +18,6 @@ Each improvement entry should include:
 
 ## Improvements
 
-#### 2026-03-23: Rule Enhancement — Change Feed Idempotency Guidance (Rule 9.1)
-
-- **Scenario**: gaming-leaderboard
-- **Iteration**: Java iterations P02/R04, P02/R05, P03/R03, P03/R04
-- **Issue**: Rule 9.1 (`pattern-change-feed-materialized-views`) documented Change Feed Processor setup mechanics but provided no guidance on at-least-once delivery semantics. 100% of Change Feed + counter runs (4/4) produced non-idempotent handlers using `getTotalGames() + 1` or `totalGames += 1` patterns, causing silent double-counting on event replay.
-- **Improvement**: Enhanced Rule 9.1 with idempotency semantics guidance:
-  - Added prominent warning that Change Feed delivers events at-least-once
-  - Added incorrect pattern examples (Java, .NET) showing non-idempotent counter increments
-  - Added three correct idempotent alternatives: replace pattern (absolute values), conditional write (ETags), and mark-and-rebuild
-  - Added comparison table of idempotent patterns with trade-offs
-  - Updated Key Points to emphasize idempotency requirement
-  - Added reference to Change Feed design patterns documentation
-- **Files Modified**:
-  - `skills/cosmosdb-best-practices/rules/pattern-change-feed-materialized-views.md` (ENHANCED)
-  - `skills/cosmosdb-best-practices/AGENTS.md` (recompiled)
-
 #### 2026-03-12: New Rules — Parameterized TOP and Composite Index Directions
 
 - **Scenario**: gaming-leaderboard