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/ISSUE_TEMPLATE/6-docs-issue.yml

@@ -0,0 +1,27 @@
+name: 📗 Documentation Issue
+description: Tell us if there is missing or incorrect documentation
+labels: [documentation]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for submitting a documentation request. It helps make Codex better.
+  - type: dropdown
+    attributes:
+      label: What is the type of issue?
+      multiple: true
+      options:
+        - Documentation is missing
+        - Documentation is incorrect
+        - Documentation is confusing
+        - Example code is not working
+        - Something else
+  - type: textarea
+    attributes:
+      label: What is the issue?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Where did you find it?
+      description: If possible, please provide the URL(s) where you found this issue.