Add tenant theming API, DTOs, and audit date improvements

- Introduce API client methods and DTOs for tenant theming (get, update, reset theme)
- Add ProvisioningClient with retry method and audit detail fetch by ID
- Switch DateTime query params to ISO 8601 ("o") format for accuracy
- Improve audit date filtering in UI using DateTimeOffset and UTC
- Update permissions, .gitignore, and NSwag config for new features

Author: iammukeshm

.claude/settings.local.json

@@ -1,10 +1,10 @@
 {
   "permissions": {
     "allow": [
-      "Bash(dotnet build:*)",
-      "Bash(dotnet ef migrations add:*)",
-      "Bash(taskkill:*)",
-      "Bash(docker start:*)"
+      "Bash(Stop-Process -Force)",
+      "Bash(pkill:*)",
+      "Bash(dotnet clean:*)",
+      "Bash(dotnet run:*)"
     ],
     "deny": [],
     "ask": []

.gitignore

@@ -492,4 +492,4 @@ docs/
 spec-os/
 /PLAN.md
 /nul
-**/wwwroot/uploads/*
+**/wwwroot/uploads/*

scripts/openapi/nswag-playground.json

@@ -36,7 +36,7 @@
       "generateContractsOutput": false,
       "contractsNamespace": null,
       "contractsOutputFilePath": null,
-      "parameterDateTimeFormat": "s",
+      "parameterDateTimeFormat": "o",
       "parameterDateFormat": "yyyy-MM-dd",
       "generateUpdateJsonSerializerSettingsMethod": true,
       "useRequestAndResponseSerializationSettings": false,