docs(turn-loop.md): document get_loose_ends agent parameter scoping

Add clarification for the agent parameter: omit to list own threads,
pass agent name for direct children (always accessible), or query_agent_state
capability for non-children. Note that hive-wide '*' query unavailable
on agent socket.

docs/turn-loop.md

@@ -315,13 +315,17 @@ ttl_seconds?, to?)`, `answer(id, answer)`.
 - `answer` — respond to a `question_asked` event routed to this
   agent. Strict authorisation: only the declared target can answer.
 
-**Inbox** (`inbox` group): `get_loose_ends()`,
+**Inbox** (`inbox` group): `get_loose_ends(agent?)`,
 `cancel_loose_end(kind, id)`, `remind(message, delay_seconds? |
 at_unix_timestamp?)`, `request_next_turn()`.
 
-- `get_loose_ends` — list pending questions (asked/owed) and
+- `get_loose_ends(agent?)` — list pending questions (asked/owed) and
   scheduled reminders. Each row carries an id + kind for
-  `cancel_loose_end`.
+  `cancel_loose_end`. Omit `agent` to list your own threads. Pass
+  `agent: "<name>"` to inspect a direct child agent (always
+  accessible per topology enforcement); non-children require the
+  `query_agent_state` capability. The `"*"` hive-wide query is not
+  available on the agent socket.
 - `cancel_loose_end` — withdraw a `question` (posts `[cancelled by
   <self>]`), hard-delete a `reminder`, or cancel a pending `approval`
   row. Agents may only cancel rows they own; the `approval` kind is