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/state_snapshot.rs

@@ -293,7 +293,7 @@ where
 /// minutes.
 const CRASH_WARNING_WINDOW: std::time::Duration = std::time::Duration::from_mins(10);
 
-/// `GET /api/state` — cold-load snapshot of the whole dashboard.
+/// Cold-load snapshot of the whole dashboard.
 ///
 /// Includes the roster, approvals (+ history), questions (+ history),
 /// tombstones, job queue, meta inputs, and more. Live clients then