feat(ai): add ADR-036 unified OCR architecture and frontend test coverage

- Add ADR-036 unified OCR architecture (typhoon-ocr via Ollama)
- Extend AI execution profiles for OCR sandbox configuration
- Add comprehensive frontend test coverage (components, hooks, services)
- Add backend test coverage for document-numbering services
- Update OCR sidecar with typhoon-ocr integration
- Add AI policy service and execution profile management
- Update AGENTS.md and architecture documentation

backend/src/.understand-anything/.understandignore

@@ -0,0 +1,13 @@
+# ยกเว้นไฟล์ทดสอบและ specs
+*.spec.ts
+*.test.ts
+*.spec.js
+*.test.js
+__tests__/
+tests/
+test/
+
+# ยกเว้นแคชและไฟล์ชั่วคราว
+.jest-cache/
+tmp/
+temp/

backend/src/.understand-anything/meta.json

@@ -0,0 +1,6 @@
+{
+  "lastAnalyzedAt": "2026-06-13T13:05:10.551Z",
+  "gitCommitHash": "190b9a3af5f505e9ec59ba8d447c4720b2cb7dae",
+  "version": "1.0.0",
+  "analyzedFiles": 487
+}