Audit: 5-reviewer sweep — 19 fixes across every stage, +24 tests

Correctness: review vetoes persist via a dedupe_veto column (resolve
re-runs no longer overturn humans); diff emits second copies whose
confident version matches no owned copy (spec: pairs own only on both
ids) and fetches the live collection with refresh; resolve pairs
titles.json entries to rows by title so a reshoot photo updates
provenance instead of duplicating rows; version lookups survive empty
/thing results; publisher tie-break now honors the mixed
base/expansion veto and refuses multi-candidate picks; empty-normalized
(non-Latin) titles never count as exact.

Upload: LoginError aborts a run instead of logging N bogus failures
(and 3 identical consecutive failures abort as systemic); Cloudflare
interstitials are detected; added-without-version gets its own logged
status that verify understands; same-game updates run one per pass so
the name-targeted row edit can't overwrite a fresh version; absent
diff outputs fail loudly; pagination clicks are paced.

Web review: a lock serializes freshen/decide (threadpool race dropped
decisions); failed saves roll memory back and always alert the browser
(non-JSON 500s included); session warnings reach the page instead of a
StringIO; state-load failures and dead servers show banners instead of
a blank page; duplicate (title, photos) rows are addressable by
ordinal.

Consistency: shared CONFIDENT_VERSION_STATUSES, client_for(),
Config paths for every artifact, one review-port constant, named
matching thresholds, strict collection-id parsing, error-doc responses
never cached, unknown config keys warn, extract reports dropped vision
entries, fixture generators share escaping + marker text.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_config.py

@@ -1,3 +1,7 @@
+"""Config loading: toml knobs, env-only username, unknown-key warning."""
+
+from __future__ import annotations
+
 from pathlib import Path
 
 from bggpipe.config import Config, load_config
@@ -29,3 +33,14 @@ def test_username_comes_from_env_only(tmp_path, monkeypatch):
     assert load_config(p).bgg_username == "from_env"
     monkeypatch.delenv("BGG_USERNAME")
     assert load_config(p).bgg_username == ""
+
+
+def test_unknown_toml_keys_warn(tmp_path, monkeypatch):
+    # a typo'd knob must not silently fall back to defaults
+    import pytest
+
+    monkeypatch.delenv("BGG_USERNAME", raising=False)
+    p = tmp_path / "config.toml"
+    p.write_text('photo_dir = "oops"\n')
+    with pytest.warns(UserWarning, match="photo_dir"):
+        load_config(p)