hive-c0re: drop redundant METHOD/path prefixes from OpenAPI summaries

Swagger UI's endpoint-list row already shows the HTTP method badge +
path for every row, so restating `METHOD /path` at the start of a
handler's own summary is pure duplication. Strips that self-referential
prefix from every summary that has it and re-capitalizes what follows
as a standalone sentence.

Left two false positives untouched: misc_api.rs's operator-inbox
summary cross-references a *different* sibling endpoint
(mark-all-read) for context, and topology.rs's SetParentForm struct
doc happens to mention its endpoint's path but isn't a handler summary
line. Both are legitimate, not redundant.

hive-c0re/src/dashboard/topology.rs

@@ -47,7 +47,7 @@ pub(super) struct SetParentBulkEntry {
     new_parent: Option<String>,
 }
 
-/// `POST /api/topology/set-parent` — operator-driven parent move.
+/// Operator-driven parent move.
 ///
 /// Form fields: `child` (required, agent name), `new_parent`
 /// (optional — empty / absent string ⇒ promote to root). Refuses
@@ -103,7 +103,7 @@ pub(super) async fn post_set_parent(
     Ok((StatusCode::OK, "ok").into_response())
 }
 
-/// `POST /api/topology/set-parent-bulk` — move multiple agents in a
+/// Move multiple agents in a
 /// single request, producing **one** git commit.
 ///
 /// JSON body: `[{"child":"name", "new_parent":"target-or-null"}, ...]`.