[Sub-Epic] Testing Infrastructure — Shared test platform and harnesses

[radoxtech]

Overview

Routes the existing Testing Infrastructure tasks under Epic #10 through a real Level 3 container for the 4-level hierarchy.

Parent

Epic: #10
Meta-Epic lineage: #367

Tracking

• DC-TEST-001: Vitest workspace and monorepo test baseline [POC] #86
• DC-TEST-002: Shared test utilities, factories, and fixtures [POC] #87
• DC-TEST-003: Integration test harness (SQLite + Hono + env isolation) [POC] #88
• DC-TEST-004: CI test pipeline and coverage reporting [POC] #89

Acceptance Criteria

• Existing testing tasks are grouped under a real sub-epic parent
• Epic Epic: Testing Infrastructure [POC] #10 no longer acts as a direct task bucket in the active hierarchy model

[radoxtech]

Closed as part of backlog remediation — the old 4-level hierarchy (Meta-Epic → Epic → Sub-Epic → Task) has been replaced by a 9-module architecture. Child tasks will be rewritten under new module-level epics.