fix(01): revise plans based on checker feedback

- Remove AbstractClickHouseIT and application-test.yml from Plan 01-01,
  move to Plan 01-03 Task 1 (reduces 01-01 from 15 to 13 files)
- Change Plan 01-02 Task 1 tdd="true" to tdd="false" (compile-only verify)
- Add DiagramRepository and MetricsRepository flush key_links to Plan 01-02
- Update VALIDATION.md: INGST-06 TTL maps to HealthControllerIT#ttlConfigured*
  instead of non-existent ClickHouseTtlIT

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

.planning/phases/01-ingestion-pipeline-api-foundation/01-02-PLAN.md

@@ -60,7 +60,15 @@ must_haves:
     - from: "ClickHouseFlushScheduler.java"
       to: "ClickHouseExecutionRepository.java"
       via: "insertBatch call"
-      pattern: "repository\\.insertBatch"
+      pattern: "executionRepository\\.insertBatch"
+    - from: "ClickHouseFlushScheduler.java"
+      to: "ClickHouseDiagramRepository.java"
+      via: "store call after drain"
+      pattern: "diagramRepository\\.store"
+    - from: "ClickHouseFlushScheduler.java"
+      to: "ClickHouseMetricsRepository.java"
+      via: "insertBatch call after drain"
+      pattern: "metricsRepository\\.insertBatch"
 ---
 
 <objective>
@@ -127,7 +135,7 @@ public class IngestionConfig {
 
 <tasks>
 
-<task type="auto" tdd="true">
+<task type="auto" tdd="false">
   <name>Task 1: IngestionService, ClickHouse repositories, and flush scheduler</name>
   <files>
     cameleer3-server-core/src/main/java/com/cameleer3/server/core/ingestion/IngestionService.java,
@@ -136,15 +144,6 @@ public class IngestionConfig {
     cameleer3-server-app/src/main/java/com/cameleer3/server/app/storage/ClickHouseMetricsRepository.java,
     cameleer3-server-app/src/main/java/com/cameleer3/server/app/ingestion/ClickHouseFlushScheduler.java
   </files>
-  <behavior>
-    - IngestionService.acceptExecutions(list) delegates to WriteBuffer.offerBatch, returns boolean
-    - IngestionService.acceptDiagram(graph) computes content hash, delegates to WriteBuffer.offer
-    - IngestionService.acceptMetrics(list) delegates to WriteBuffer.offerBatch
-    - ClickHouseExecutionRepository.insertBatch uses JdbcTemplate.batchUpdate with all columns including Array columns for processor executions
-    - ClickHouseDiagramRepository.store computes SHA-256 content hash and does INSERT with content_hash dedup
-    - ClickHouseFlushScheduler runs on @Scheduled(fixedDelayString="${ingestion.flush-interval-ms:1000}"), drains each buffer and calls respective repository.insertBatch
-    - ClickHouseFlushScheduler implements SmartLifecycle for graceful shutdown (flush remaining on stop)
-  </behavior>
   <action>
     1. Create IngestionService in core module (no Spring annotations -- it's a plain class):
        - Constructor takes three WriteBuffer instances (executions, diagrams, metrics)