Add architecture package and application skeleton

docs/testing/01_strategy.md

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+# Testing Strategy
+
+## Layers
+
+### Unit Tests
+
+- state transitions
+- policy evaluation
+- graph readiness
+- fallback logic
+
+### Contract Tests
+
+- API schemas
+- worker envelopes
+- MCP result normalization
+- model router output contracts
+
+### Integration Tests
+
+- repository implementations
+- event streaming
+- config loader
+- storage adapters
+
+### Scenario Tests
+
+- create task -> plan -> execute -> finalize
+- confirm flow
+- weak retry then strong fallback
+- worker result ingestion
+
+### Smoke Tests
+
+Обязательный список зафиксирован в [tests/smoke/SMOKE_TESTS.md](/Z:/codex/ai_orchestrator/tests/smoke/SMOKE_TESTS.md).
+