Remove REST API, keep GraphQL as sole API

- Add missing GraphQL mutations: retryJob, updateAsset, deleteAsset
- Add UpdateAssetRequest and DeleteResult to schema source of truth
- Move Lambda callback endpoint to main.py (only REST endpoint)
- Remove REST routes, pydantic schemas, and deps
- Remove pydantic target from modelgen.json
- Update architecture diagrams and documentation

docs/architecture/index.html

@@ -57,8 +57,7 @@
                 </li>
                 <li>
                     <span class="color-box" style="background: #f0f8e8"></span>
-                    Application Layer (Django Admin, FastAPI + GraphQL, Timeline
-                    UI)
+                    Application Layer (Django Admin, GraphQL API, Timeline UI)
                 </li>
                 <li>
                     <span class="color-box" style="background: #fff8e8"></span>
@@ -170,24 +169,31 @@
             </p>
         </div>
 
-        <h2>API Interfaces</h2>
-        <pre><code># REST API
-http://mpr.local.ar/api/docs     - Swagger UI
-POST /api/assets/scan             - Scan S3 bucket for media
-POST /api/jobs/                   - Create transcode job
-POST /api/jobs/{id}/callback      - Lambda completion callback
+        <h2>API (GraphQL)</h2>
+        <pre><code># GraphiQL IDE
+http://mpr.local.ar/graphql
 
-# GraphQL (GraphiQL)
-http://mpr.local.ar/graphql       - GraphiQL IDE
-query { assets { id filename } }
-mutation { createJob(input: {...}) { id status } }
-mutation { scanMediaFolder { found registered } }</code></pre>
+# Queries
+query { assets(status: "ready") { id filename duration } }
+query { jobs(status: "processing") { id status progress } }
+query { presets { id name container videoCodec } }
+query { systemStatus { status version } }
+
+# Mutations
+mutation { scanMediaFolder { found registered skipped } }
+mutation { createJob(input: { sourceAssetId: "...", presetId: "..." }) { id status } }
+mutation { cancelJob(id: "...") { id status } }
+mutation { retryJob(id: "...") { id status } }
+mutation { updateAsset(id: "...", input: { comments: "..." }) { id comments } }
+mutation { deleteAsset(id: "...") { ok } }
+
+# Lambda callback (REST)
+POST /api/jobs/{id}/callback      - Lambda completion webhook</code></pre>
 
         <h2>Access Points</h2>
         <pre><code># Local development
 127.0.0.1 mpr.local.ar
 http://mpr.local.ar/admin         - Django Admin
-http://mpr.local.ar/api/docs      - FastAPI Swagger
 http://mpr.local.ar/graphql       - GraphiQL
 http://mpr.local.ar/              - Timeline UI
 http://localhost:9001              - MinIO Console