Rewrite Miniflux plugin to use requests, add filter and bookmark tools

Drop the miniflux pip client in favour of requests (already in the
container). Add update_feed_filters (keeplist/blocklist regex),
toggle_bookmark, get_entry (full content), and category filtering.
Remove the pip install step from Ansible.

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

infra/hermes/plugins/miniflux/schemas.py

@@ -24,6 +24,10 @@ GET_UNREAD_ENTRIES = {
                 "type": "integer",
                 "description": "Filter to a specific feed. Omit for all feeds.",
             },
+            "category_id": {
+                "type": "integer",
+                "description": "Filter to a specific category. Omit for all categories.",
+            },
             "limit": {
                 "type": "integer",
                 "description": "Maximum number of entries to return. Defaults to 20.",
@@ -32,3 +36,81 @@ GET_UNREAD_ENTRIES = {
         "required": [],
     },
 }
+
+GET_ENTRY = {
+    "name": "get_entry",
+    "description": (
+        "Get a single entry from Miniflux by ID, including its full content. "
+        "Use this to read an article's text."
+    ),
+    "parameters": {
+        "type": "object",
+        "properties": {
+            "entry_id": {
+                "type": "integer",
+                "description": "The entry ID to retrieve.",
+            },
+        },
+        "required": ["entry_id"],
+    },
+}
+
+TOGGLE_BOOKMARK = {
+    "name": "toggle_bookmark",
+    "description": "Toggle the bookmark/star status of a Miniflux entry.",
+    "parameters": {
+        "type": "object",
+        "properties": {
+            "entry_id": {
+                "type": "integer",
+                "description": "The entry ID to bookmark or unbookmark.",
+            },
+        },
+        "required": ["entry_id"],
+    },
+}
+
+UPDATE_FEED_FILTERS = {
+    "name": "update_feed_filters",
+    "description": (
+        "Update the keep or block filter rules on a Miniflux feed. "
+        "Rules are case-insensitive regexes matched against entry titles and URLs. "
+        "keeplist_rules: only entries matching are kept. "
+        "blocklist_rules: entries matching are excluded. "
+        "Pass an empty string to clear a rule."
+    ),
+    "parameters": {
+        "type": "object",
+        "properties": {
+            "feed_id": {
+                "type": "integer",
+                "description": "The feed ID to update.",
+            },
+            "keeplist_rules": {
+                "type": "string",
+                "description": "Regex pattern. Only matching entries are kept. Omit to leave unchanged.",
+            },
+            "blocklist_rules": {
+                "type": "string",
+                "description": "Regex pattern. Matching entries are excluded. Omit to leave unchanged.",
+            },
+        },
+        "required": ["feed_id"],
+    },
+}
+
+MARK_AS_READ = {
+    "name": "mark_as_read",
+    "description": "Mark one or more Miniflux entries as read.",
+    "parameters": {
+        "type": "object",
+        "properties": {
+            "entry_ids": {
+                "type": "array",
+                "items": {"type": "integer"},
+                "description": "List of entry IDs to mark as read.",
+            },
+        },
+        "required": ["entry_ids"],
+    },
+}