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/schemas.py

@@ -0,0 +1,34 @@
+LIST_FEEDS = {
+    "name": "list_feeds",
+    "description": (
+        "List all subscribed RSS feeds from Miniflux. "
+        "Returns feed titles, URLs, and unread counts."
+    ),
+    "parameters": {
+        "type": "object",
+        "properties": {},
+        "required": [],
+    },
+}
+
+GET_UNREAD_ENTRIES = {
+    "name": "get_unread_entries",
+    "description": (
+        "Get unread entries from Miniflux. "
+        "Optionally filter by feed ID and limit the number of results."
+    ),
+    "parameters": {
+        "type": "object",
+        "properties": {
+            "feed_id": {
+                "type": "integer",
+                "description": "Filter to a specific feed. Omit for all feeds.",
+            },
+            "limit": {
+                "type": "integer",
+                "description": "Maximum number of entries to return. Defaults to 20.",
+            },
+        },
+        "required": [],
+    },
+}