feat: AcoustID audio verification, MusicBrainz enrichment UI, v1.5

  Add optional post-download audio fingerprint verification using AcoustID.
  Downloads are verified against expected track/artist using fuzzy string
  matching on AcoustID results. Mismatched files are quarantined and
  automatically added to the wishlist for retry.

  - AcoustID verification with title/artist fuzzy matching (not MBID comparison)
  - Quarantine system with JSON metadata sidecars for failed verifications
  - fpcalc binary auto-download for Windows, macOS (universal), and Linux
  - MusicBrainz enrichment worker with live status UI and track badges
  - Settings page AcoustID section with real-fingerprint connection test
  - Source reuse for album downloads to keep tracks from same Soulseek user
  - Enhanced search queries for better track matching
  - Bug fixes: wishlist tracking, album splitting, regex & handling, log rotation

Author: Nezreka

.gitignore

@@ -6,3 +6,6 @@ __pycache__/
 **/__pycache__/
 *.pyc
 *.pyo
+
+# Auto-downloaded binaries
+bin/

Dockerfile

@@ -15,6 +15,7 @@ RUN apt-get update && apt-get install -y \
     curl \
     gosu \
     ffmpeg \
+    libchromaprint-tools \
     && rm -rf /var/lib/apt/lists/*
 
 # Create non-root user for security

config/settings.py

@@ -195,6 +195,10 @@ def _get_default_config(self) -> Dict[str, Any]:
             "listenbrainz": {
                 "token": ""
             },
+            "acoustid": {
+                "api_key": "",
+                "enabled": False  # Disabled by default - requires API key and fpcalc
+            },
             "logging": {
                 "path": "logs/app.log",
                 "level": "INFO"