Include Essentia models in repo + optimize CI/CD

Problème: Les modèles Essentia (28 MB) étaient téléchargés à chaque build CI/CD
- Ralentit les builds (~30 secondes de download)
- Consomme bande passante
- Point de défaillance si serveur Essentia down

Solution:
- Commit les 6 modèles dans backend/models/
- Supprime steps "Download Essentia models" du workflow Gitea
- Retire backend/models/*.pb et *.json du .gitignore

Modèles inclus (~28 MB total):
- discogs-effnet-bs64-1.pb (18 MB) - embedding model
- genre_discogs400-discogs-effnet-1.pb (2 MB) - genre classifier
- genre_discogs400-discogs-effnet-1.json (15 KB) - genre metadata
- mtg_jamendo_moodtheme-discogs-effnet-1.pb (2.6 MB) - mood
- mtg_jamendo_instrument-discogs-effnet-1.pb (2.6 MB) - instruments
- mtg_jamendo_genre-discogs-effnet-1.pb (2.7 MB) - genre alt

Bénéfices:
✅ Builds CI/CD plus rapides (~30s gagnées)
✅ Pas de dépendance externe au serveur Essentia
✅ Versioning des modèles avec le code
✅ Repo offline-friendly

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.gitea/workflows/docker.yml

@@ -23,41 +23,6 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Download Essentia models
-        run: |
-          mkdir -p backend/models
-          cd backend/models
-
-          # Download models from Essentia
-          echo "Downloading Essentia models..."
-
-          # Embedding model (18 MB)
-          curl -L -o discogs-effnet-bs64-1.pb \
-            https://essentia.upf.edu/models/feature-extractors/discogs-effnet/discogs-effnet-bs64-1.pb
-
-          # Genre classifier (2 MB)
-          curl -L -o genre_discogs400-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/genre_discogs400/genre_discogs400-discogs-effnet-1.pb
-
-          # Genre metadata
-          curl -L -o genre_discogs400-discogs-effnet-1.json \
-            https://essentia.upf.edu/models/classification-heads/genre_discogs400/genre_discogs400-discogs-effnet-1.json
-
-          # Mood classifier (2.7 MB)
-          curl -L -o mtg_jamendo_moodtheme-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/mtg_jamendo_moodtheme/mtg_jamendo_moodtheme-discogs-effnet-1.pb
-
-          # Instrument classifier (2.6 MB)
-          curl -L -o mtg_jamendo_instrument-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/mtg_jamendo_instrument/mtg_jamendo_instrument-discogs-effnet-1.pb
-
-          # Genre classifier alternative (2.7 MB)
-          curl -L -o mtg_jamendo_genre-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/mtg_jamendo_genre/mtg_jamendo_genre-discogs-effnet-1.pb
-
-          ls -lh
-          echo "Models downloaded successfully!"
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -112,25 +77,6 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Download Essentia models (for context)
-        run: |
-          mkdir -p backend/models
-          cd backend/models
-
-          # Download models (needed because frontend build context is root)
-          curl -L -o discogs-effnet-bs64-1.pb \
-            https://essentia.upf.edu/models/feature-extractors/discogs-effnet/discogs-effnet-bs64-1.pb
-          curl -L -o genre_discogs400-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/genre_discogs400/genre_discogs400-discogs-effnet-1.pb
-          curl -L -o genre_discogs400-discogs-effnet-1.json \
-            https://essentia.upf.edu/models/classification-heads/genre_discogs400/genre_discogs400-discogs-effnet-1.json
-          curl -L -o mtg_jamendo_moodtheme-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/mtg_jamendo_moodtheme/mtg_jamendo_moodtheme-discogs-effnet-1.pb
-          curl -L -o mtg_jamendo_instrument-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/mtg_jamendo_instrument/mtg_jamendo_instrument-discogs-effnet-1.pb
-          curl -L -o mtg_jamendo_genre-discogs-effnet-1.pb \
-            https://essentia.upf.edu/models/classification-heads/mtg_jamendo_genre/mtg_jamendo_genre-discogs-effnet-1.pb
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3