docs(15-02): complete configuration integration plan

- Created SUMMARY.md documenting config integration
- Updated STATE.md with decisions and metrics
- Updated ROADMAP.md progress (3/4 summaries complete)
- Marked requirements OUTPUT-01, OUTPUT-02, OUTPUT-03 complete

Plan 15-02 complete:
- SRTProcessor reads enable_semantic_segmentation from KBSettings
- Config priority: parameter > KBSettings > default (True)
- 34/34 tests passing (9 new tests added)
- Duration: ~15 minutes

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

.planning/STATE.md

@@ -3,8 +3,8 @@ gsd_state_version: 1.0
 milestone: v1.4
 milestone_name: Zhihu Anti-Crawler
 status: executing
-stopped_at: Completed 15-03-PLAN.md (backward compatibility tests)
-last_updated: "2026-03-23T15:04:16.832Z"
+stopped_at: Completed Phase 15 Plan 02 (configuration integration)
+last_updated: "2026-03-23T15:04:20.774Z"
 last_activity: 2026-03-23 — Phase 15 Plan 01 completed (enable_semantic_segmentation config integration)
 progress:
   total_phases: 15
@@ -168,8 +168,8 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-03-23T15:04:13.311Z
-Stopped at: Completed 15-03-PLAN.md (backward compatibility tests)
+Last session: 2026-03-23T15:04:20.772Z
+Stopped at: Completed Phase 15 Plan 02 (configuration integration)
 Resume file: None
 
 **Next step:** Phase 14 Plan 04 (分块处理) may need completion, or continue to Phase 15 (优化)