fix(proxy): meaningful audit data — strip suffixes + cache title-fast-path matches

[unknown0152]

Summary

Fixes two compounding bugs that made every classifier_audit row report mismatch_type=missed_dkaudio regardless of what the proxy actually knew.

The two bugs

1. /learn/imported lookup never matched the cache:
Radarr's radarr_moviefile_scenename env var contains the title the proxy returned — INCLUDING the appended .DKaudio / .NFODV etc tags. nfo_cache.release_name stores the un-suffixed canonical title. So WHERE release_name=? could not find existing classifications.

2. Title-fast-path tags never wrote to cache:
In hunt_danish, fast paths (AUDIO_DK_RE, is_native_dk_title, ATTR matches) set found_hits[nid] then continue without cache_set. Even when the proxy correctly classified a release via title alone, there was no cache row for /learn/imported to find.

Fix

• New strip_proxy_suffix(release_name) helper (regex strips trailing .DKaudio|.DKOK + zero or more .NFOxxx).
• _handle_learn_imported strips the lookup name before WHERE release_name=? and before cache_set. The audit row keeps the original (suffixed) sceneName for debugging visibility.
• Every fast-path branch in hunt_danish now calls cache_set(nid, tag, title, source=...) with the spec's source precedence:
  • title regex / native-DK → source="title"
  • attr-based detection → source="attr"

After this

• classifier_audit.mismatch_type will show meaningful values (agreement, upgrade, missed_dkaudio, false_dkaudio, false_dkok) reflecting real proxy-vs-ffprobe accuracy
• Title-fast-path verdicts contribute to cross-search cache reuse

Tests

11 new across 3 test files:

• tests/test_strip_proxy_suffix.py (8 tests on the helper)
• tests/test_learn_endpoint.py (+1 integration: suffixed POST finds un-suffixed cache row → agreement)
• tests/test_title_path_caches.py (+2: title and attr fast-paths write to cache)

216 tests pass (205 baseline + 11 new).

Verified live

Pre-seed cache with ('test123', '.DKaudio', 'TestAudit.2026.NORDiC-FOO', source='title'). POST {release_name: "TestAudit.2026.NORDiC-FOO.DKaudio.NFODV", audio_languages: ["dan", ...]}. Response:

previous_tag:    .DKaudio   ✓
previous_source: title      ✓
mismatch_type:   agreement  ✓ (was 'missed_dkaudio' pre-fix)

🤖 Generated with Claude Code

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 00210bd6-ca89-4a8f-b530-7455e95106fb

📥 Commits

Reviewing files that changed from the base of the PR and between 398ebe4 and a693723.

📒 Files selected for processing (4)

• dksubs-proxy.py
• tests/test_learn_endpoint.py
• tests/test_strip_proxy_suffix.py
• tests/test_title_path_caches.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/audit-release-name-and-title-cache

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