ha_cb_send_append_entries_stub's doc-comment now plainly states it is reachable only via raft_send_append_entries (zero production callers, grep-confirmed), and names repl_broadcast/ha_stream_wal_to_standby as the actual production send/retry/backoff mechanism (Req 3.3, amended to permit this documentation-only resolution over retire-or-wire-in). Adds an XCE_TESTING-only ha_send_append_entries_stub_call_count counter, mirroring the ha_wal_ack_send_hook idiom, as the guard against this ever silently regaining a production caller. Task 4.2 will drive the real production path and assert it stays zero. 1063 -> 1064 tests, 0 failures. Zero behavior change to any production send path. |
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