fix: Add JSON string enum converter for Issue Management API

- Configure AddControllers() with JsonStringEnumConverter
- Allows API to accept Issue type/priority/status as strings ("Story", "High", "Backlog")
- Frontend can now send readable enum values instead of integers
- All Issue Management CRUD operations tested and working

Test results:
- Create Issue (Story, Bug, Task) ✓
- List all issues ✓
- Filter by status (Backlog, InProgress) ✓
- Change issue status (Kanban workflow) ✓
- Update issue details ✓
- Multi-tenant isolation verified ✓

.claude/settings.local.json

@@ -1,27 +1,11 @@
 {
   "permissions": {
     "allow": [
-      "Bash(npm install:*)",
-      "Bash(dotnet remove:*)",
-      "Bash(npm run lint)",
-      "Bash(npm run build:*)",
-      "Bash(timeout 10 npm run dev:*)",
-      "Bash(npx tsc:*)",
-      "Bash(timeout /t 10)",
-      "Bash(kill:*)",
-      "Bash(Select-String \"error\" -Context 0,2)",
-      "Bash(powershell.exe -ExecutionPolicy Bypass -File test-project-api.ps1)",
-      "Bash(powershell.exe -ExecutionPolicy Bypass -File test-project-simple.ps1)",
-      "Bash(powershell.exe -ExecutionPolicy Bypass -File test-project-debug.ps1)",
-      "Bash(Select-String -Pattern \"error\" -Context 0,2)",
-      "Bash(git add:*)",
-      "Bash(git restore:*)",
-      "Bash(git commit -m \"$(cat <<''EOF''\nfeat(agents): Enforce mandatory testing in backend agent\n\nUpdate backend agent to enforce testing requirements:\n- Extended workflow from 8 to 9 steps with explicit test phases\n- Added CRITICAL Testing Rule: Must run dotnet test after every change\n- Never commit with failing tests or compilation errors\n- Updated Best Practices to emphasize testing (item 8)\n- Removed outdated TypeScript/NestJS examples\n- Updated Tech Stack to reflect actual .NET 9 stack\n- Simplified configuration for better clarity\n\nChanges:\n- Workflow step 6: \"Run Tests: MUST run dotnet test - fix any failures\"\n- Workflow step 7: \"Git Commit: Auto-commit ONLY when all tests pass\"\n- Added \"CRITICAL Testing Rule\" section after workflow\n- Removed Project Structure, Naming Conventions, Code Standards sections\n- Updated tech stack: C# + .NET 9 + ASP.NET Core + EF Core + PostgreSQL + MediatR + FluentValidation\n- Removed Example Flow section for brevity\n\n🤖 Generated with [Claude Code](https://claude.com/claude-code)\n\nCo-Authored-By: Claude <noreply@anthropic.com>\nEOF\n)\")",
-      "Bash(npm run dev:*)",
-      "Bash(git status:*)",
-      "Bash(git ls-files:*)",
-      "Bash(cat >*)",
-      "Bash(cat :*)"
+      "Bash(ls:*)",
+      "Bash(powershell.exe -ExecutionPolicy Bypass -File \"c:\\Users\\yaoji\\git\\ColaCoder\\product-master\\colaflow-api\\test-project-simple.ps1\")",
+      "Bash(TOKEN=\"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiI2ODM4NTcwOC0yZjJiLTQzMTItYjdiOS1hOGFiMjI3NTliMDkiLCJlbWFpbCI6ImFkbWluQHF1aWNrdGVzdDk5OS5jb20iLCJqdGkiOiJjMmRjNDI2ZS0yODA5LTRiNWMtYTY2YS1kZWI3ZjU2YWNkMmIiLCJ1c2VyX2lkIjoiNjgzODU3MDgtMmYyYi00MzEyLWI3YjktYThhYjIyNzU5YjA5IiwidGVuYW50X2lkIjoiYjM4OGI4N2EtMDQ2YS00MTM0LWEyNmMtNWRjZGY3ZjkyMWRmIiwidGVuYW50X3NsdWciOiJxdWlja3Rlc3Q5OTkiLCJ0ZW5hbnRfcGxhbiI6IlByb2Zlc3Npb25hbCIsImZ1bGxfbmFtZSI6IlRlc3QgQWRtaW4iLCJhdXRoX3Byb3ZpZGVyIjoiTG9jYWwiLCJ0ZW5hbnRfcm9sZSI6IlRlbmFudE93bmVyIiwiaHR0cDovL3NjaGVtYXMubWljcm9zb2Z0LmNvbS93cy8yMDA4LzA2L2lkZW50aXR5L2NsYWltcy9yb2xlIjoiVGVuYW50T3duZXIiLCJleHAiOjE3NjIyNTQ3MzgsImlzcyI6IkNvbGFGbG93LkFQSSIsImF1ZCI6IkNvbGFGbG93LldlYiJ9.RWL-wWNgOleP4eT6uEN-3FXLhS5EijPfjlsu4N82_80\")",
+      "Bash(PROJECT_ID=\"2ffdedc9-7daf-4e11-b9b1-14e9684e91f8\":*)",
+      "Bash(powershell.exe -ExecutionPolicy Bypass -File \"c:\\Users\\yaoji\\git\\ColaCoder\\product-master\\colaflow-api\\test-issue-quick.ps1\")"
     ],
     "deny": [],
     "ask": []