feat(server): podpuddle scaffold + Fastify backend (nostr auth, RSS, streams)

- docker-compose stack: podpuddle + MediaMTX (RTMP/WHIP/HLS) + blossom-server
- NIP-98 nostr-only login with session cookies, replay guard, clock-skew window
- podcasts/episodes CRUD; episodes register browser-uploaded blossom blobs
- RSS 2.0 + itunes + podcast namespace feeds with lnaddress value blocks
  (podcast:guid UUIDv5 verified against the spec vector)
- streams API with hashed stream keys; MediaMTX http-auth webhook
  (query/password/bearer forms); API poller flips live/ended status
- NIP-53 kind 30311 live events published with the server's nostr identity
- recordings: ffmpeg remux + server-key blossom upload → podcast episode
- 35 vitest tests green

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "lib": ["ES2022"],
+    "outDir": "dist",
+    "rootDir": "src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "declaration": false,
+    "sourceMap": false
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["src/**/*.test.ts"]
+}