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/extra_forges.rs

@@ -58,7 +58,7 @@ pub(super) struct ExtraForgesQuery {
     agent: String,
 }
 
-/// `GET /api/extra-forges?agent=<name>` — list the external forge
+/// List the external forge
 /// accounts currently provisioned for `agent`.
 ///
 /// Derived from every `forge-<label>-token` file in its state dir
@@ -135,7 +135,7 @@ struct ExtraForgeAccountResult {
     ok: bool,
 }
 
-/// `POST /api/extra-forge-account` — add persists the operator-pasted
+/// Add persists the operator-pasted
 /// label/base-URL/token to the agent's state dir via hive-priv; remove
 /// deletes both files.
 ///