Initial commit: AirCoding V1.0.0 Alpha architecture baseline

Complete architecture document set with multi-model review remediation:
- Frozen interface contracts, runtime semantics, DB schemas
- Event/tool/error/provider registries
- Scheduler and main agent state machines
- C4 module/code views, solution architecture, baseline V1
- Multi-model review reports and joint assessment
- Phase-gate remediation complete (P0/P1/P2/UX resolved)
- Implementation plan with T-000A through T-045
- Reference folders kept as placeholders only

reference/openai-codex/.github/blob-size-allowlist.txt

@@ -0,0 +1,10 @@
+# Paths are matched exactly, relative to the repository root.
+# Keep this list short and limited to intentional large checked-in assets.
+
+.github/codex-cli-splash.png
+MODULE.bazel.lock
+codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
+codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json
+codex-rs/tui/tests/fixtures/oss-story.jsonl
+codex-rs/tui_app_server/tests/fixtures/oss-story.jsonl
+codex-rs/tui/src/app.rs