docs(14-01): complete phase dependencies schema plan

Tasks completed: 2/2
- Add phase_dependencies table to schema
- Add dependency methods to PhaseRepository

SUMMARY: .planning/phases/14-parallel-phase-execution/14-01-SUMMARY.md

.planning/STATE.md

@@ -10,9 +10,9 @@ See: .planning/PROJECT.md (updated 2026-02-02)
 ## Current Position
 
 Phase: 14 of 15 (Parallel Phase Execution)
-Plan: Not started
-Status: Ready to plan
-Last activity: 2026-02-02 — Milestone v1.3 created
+Plan: 1 of 8 in current phase
+Status: In progress
+Last activity: 2026-02-02 — Completed 14-01-PLAN.md
 
 Progress: ░░░░░░░░░░ 0%
 
@@ -161,6 +161,8 @@ Recent decisions affecting current work:
 - 12-08: Agent waiting emits agent:waiting event, not agent:stopped (Q&A flow)
 - 13-01: Use structured_output field (not result) when --json-schema is used with Claude CLI
 - 13-01: Integration tests skipped by default (REAL_CLAUDE_TESTS=1 to enable)
+- 14-01: phase_dependencies table mirrors task_dependencies exactly (same FK patterns, cascade delete)
+- 14-01: getDependencies/getDependents return string[] IDs for query efficiency
 
 ### Pending Todos
 
@@ -182,5 +184,5 @@ None.
 ## Session Continuity
 
 Last session: 2026-02-02
-Stopped at: Milestone v1.3 initialization
+Stopped at: Completed 14-01-PLAN.md
 Resume file: None