phase0(complete): mark Phase 0 as approved and complete

- Updated TASKS.md status to COMPLETE
- Tagged release: v3.0.0-phase0-complete
- Ready to proceed to Phase 1

Decisions made:
- Schema mismatch investigation → Phase 2
- Missing device types addition → Phase 2
- Known bugs (empty strings, float IDs) → Phase 2

Phase 0 delivered:
- 131 tests (114 unit/integration + 17 E2E)
- 15 documentation files
- CI/CD pipeline operational
- Git hooks protecting quality
- Performance baselines documented
- Zero regressions introduced

Author: edeno

TASKS.md

@@ -4,9 +4,10 @@
 
 **Project:** Comprehensive Testing & Refactoring Initiative
 **Current Phase:** Phase 0 - Baseline & Infrastructure
-**Phase Status:** 🟡 In Progress (Task 13/16)
+**Phase Status:** 🟢 COMPLETE - Approved for Phase 1
 **Last Updated:** 2025-10-23
-**Branch:** `modern` (worktree: `.worktrees/phase-0-baselines`)
+**Tagged Release:** v3.0.0-phase0-complete
+**Branch:** `refactor/phase-0-baselines` (worktree: `.worktrees/phase-0-baselines`)
 
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