Add shared Docker network and Miniflux plugin for Hermes

- Create external 'monotrope' Docker network so services can
  communicate by container name
- Add Miniflux to the shared network (db stays on internal network)
- Add Hermes Miniflux plugin with list_feeds and get_unread_entries tools
- Mount plugin directory and pass Miniflux API key to Hermes container

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infra/hermes/plugins/miniflux/__init__.py

@@ -0,0 +1,16 @@
+from . import schemas, tools
+
+
+def register(ctx):
+    ctx.register_tool(
+        name="list_feeds",
+        toolset="miniflux",
+        schema=schemas.LIST_FEEDS,
+        handler=tools.list_feeds,
+    )
+    ctx.register_tool(
+        name="get_unread_entries",
+        toolset="miniflux",
+        schema=schemas.GET_UNREAD_ENTRIES,
+        handler=tools.get_unread_entries,
+    )