resolve_history_audio_path drives a DESTRUCTIVE delete (os.remove), but lived
endpoint-bound in web_server with zero tests. Lifted to core/matching/history_paths
with injected effects (exists / resolve_library_path / lookup_titled_paths) so the
fallback chain — and the collision-safety that stops delete() from removing the
wrong same-title file — is a clean importable seam. web_server now wraps it (DB
lookup + os.path.exists + prefix resolver injected); behavior preserved.
9 tests lock it: recorded-path hit, prefix-resolve fallback, single tracks-table
candidate, and the safety rules — multiple same-title candidates with NO artist ->
None (refuse to guess), artist filter picks only the matching path, artist named
but unmatched -> None, no-title/empty-lookup -> None. Full suite green (5906).
