Address the two important findings from the claude bot's latest re-review:
- _verify_files: skip get_excluded_file_paths entirely when the tag REPORT
returns no files. An empty `tagged` yields an empty `tagged_ids` regardless
of exclusions, so the lookup's 2xlen(EXCLUDED_TAGS) WebDAV fan-out is wasted
work in the common "this tag matched nothing" case. The per-result loop still
runs, so malformed doc_ids are still kept (fail-open) — pinned by a new test
(test_verify_files_empty_tag_set_skips_exclusion_lookup), which also asserts
the exclusion lookup is never awaited.
- Rewrite the semaphore comment: it claimed "the slot bounds them", but the slot
only caps concurrent *searches* — get_excluded_file_paths internally spawns a
task group issuing 2xlen(EXCLUDED_TAGS) concurrent WebDAV calls, so live
Nextcloud connections can exceed VERIFICATION_CONCURRENCY. Comment now says so
and points at configuration.md.
The third 🟡 (sequential dir expansion in find_files_by_tag) is pre-existing and
flagged by the reviewer as a follow-up, not part of this PR.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
