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/infra_containers.rs

@@ -14,7 +14,7 @@ use hive_priv_sock::{InfraAction, InfraContainer};
 
 use super::{AppState, error_response};
 
-/// `POST /api/infra-container/{name}/{action}` — start / stop / restart a
+/// Start / stop / restart a
 /// hive infrastructure container from the dashboard.
 ///
 /// `name` parses into [`InfraContainer`] (the allowlist; unrecognised