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

ui/timeline/src/types.ts

@@ -82,6 +82,11 @@ export interface CreateJobRequest {
   priority: number;
 }
 
+export interface UpdateAssetRequest {
+  comments: string | null;
+  tags: string[] | null;
+}
+
 export interface SystemStatus {
   status: string;
   version: string;
@@ -94,6 +99,10 @@ export interface ScanResult {
   files: string[];
 }
 
+export interface DeleteResult {
+  ok: boolean;
+}
+
 export interface WorkerStatus {
   available: boolean;
   active_jobs: number;