fix: Python server dependency resolution and Docker host validation (#333)

* fix(say-server): add --index flag to uv run for PyPI resolution

The pocket-tts dependency wasn't resolving without explicit --index flag
when invoked via npm scripts.

* fix(qr-server): allow Docker bridge IP in transport security

Add 172.17.0.1:* to allowed_hosts to fix 421 Misdirected Request errors
when the server is accessed from Docker containers.

examples/say-server/package.json

@@ -10,8 +10,8 @@
   },
   "license": "MIT",
   "scripts": {
-    "start": "uv run server.py",
-    "dev": "uv run server.py",
+    "start": "uv run --index https://pypi.org/simple server.py",
+    "dev": "uv run --index https://pypi.org/simple server.py",
     "build": "echo 'No build step needed for Python server'"
   },
   "dependencies": {