Implemented v1 step1

2026-06-25 16:07:12 -05:00
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+# ADR-0001: Lifespan-owned runtime resources
+
+- **Status:** accepted
+- **Date:** 2026-06-25
+
+## Context
+
+MVP initialized core runtime resources (database engine and worker dependencies) through module-level globals and startup side effects. `REQ-7` requires lifespan-owned runtime resources with explicit ownership and cleanup.
+
+## Decision
+
+Adopt lifespan-owned runtime resource initialization in `transcription.app`:
+
+1. Initialize database runtime during app lifespan startup.
+2. Store runtime handles on `app.state`.
+3. Pass runtime-owned dependencies (engine) to worker startup.
+4. Dispose runtime resources explicitly during lifespan shutdown.
+
+## Consequences
+
+### Positive
+- Explicit startup and shutdown ownership.
+- Predictable cleanup ordering.
+- Reduced hidden global side effects.
+
+### Tradeoffs
+- Minor wiring complexity in app startup.
+- Some call-sites still support fallback lazy initialization for compatibility.
+
+## Alternatives Considered
+
+1. **Keep module-level global ownership**
+   - Rejected: conflicts with `REQ-7` and increases ambiguity.
+2. **Introduce full async DB stack immediately**
+   - Rejected for Step 1: too broad for architecture-consolidation scope.