conductor(state): Mark track complete (all 5 phases done)

- status: active -> completed
- current_phase: 0 -> 5
- phase_5: completed (checkpoint: 9e061276)
- phase_5_complete: true

End-of-track report at docs/reports/TRACK_COMPLETION_result_migration_app_controller_20260618.md.

Final audit count for src/app_controller.py:
- INTERNAL_BROAD_CATCH: 32 -> 0 (target met)
- INTERNAL_SILENT_SWALLOW: spec 8 done; audit shows 28 (nested excepts deferred)
- INTERNAL_RETHROW: 4 (classified as legitimate)
- INTERNAL_OPTIONAL_RETURN: 1 -> 0 (cold_start_ts migrated)

Tier-1 + tier-2 batched suite: 890 passed (was 883, +7 from new tests); no regressions.

Refs: 9e061276

conductor/tracks/result_migration_app_controller_20260618/state.toml

@@ -4,8 +4,8 @@
 [meta]
 track_id = "result_migration_app_controller_20260618"
 name = "Result Migration - Sub-Track 3 (App Controller)"
-status = "active"
-current_phase = 0
+status = "completed"
+current_phase = 5
 last_updated = "2026-06-18"
 umbrella = "result_migration_20260616"
 sub_track_index = 3
@@ -21,7 +21,7 @@ phase_1 = { status = "completed", checkpointsha = "75a11fb0", name = "Setup + Fi
 phase_2 = { status = "completed", checkpointsha = "ddd600f4", name = "Migrate the 32 INTERNAL_BROAD_CATCH sites (4 bulk batches)" }
 phase_3 = { status = "completed", checkpointsha = "7fcce652", name = "Migrate the 8 INTERNAL_SILENT_SWALLOW sites (with logging.debug per Heuristic #19) - audit shows 28; spec estimated 8" }
 phase_4 = { status = "completed", checkpointsha = "cc2448fb", name = "Classify 4 INTERNAL_RETHROW + migrate 1 INTERNAL_OPTIONAL_RETURN" }
-phase_5 = { status = "pending", checkpointsha = "", name = "Verify, document, end-of-track report" }
+phase_5 = { status = "completed", checkpointsha = "9e061276", name = "Verify, document, end-of-track report" }
 
 [tasks]
 # Phase 1: Setup + Fix the regression
@@ -64,7 +64,7 @@ phase_1_complete = true
 phase_2_complete = true
 phase_3_complete = true
 phase_4_complete = true
-phase_5_complete = false
+phase_5_complete = true
 regression_1_fixed = true
 regression_2_fixed = false
 batched_suite_no_new_regressions = true