[scrobbles] Add basic sentiment analysis

vrobbler/apps/scrobbles/management/commands/backfill_scrobble_sentiment.py

@@ -0,0 +1,68 @@
+from django.core.management.base import BaseCommand
+from django.db import models
+
+from scrobbles.models import Scrobble
+from scrobbles.utils import analyze_scrobble_sentiment
+
+
+class Command(BaseCommand):
+    help = "Backfill VADER sentiment analysis for scrobbles with notes"
+
+    def add_arguments(self, parser):
+        parser.add_argument(
+            "--commit",
+            action="store_true",
+            help="Actually update scrobble logs with sentiment data",
+        )
+        parser.add_argument(
+            "--overwrite",
+            action="store_true",
+            help="Re-analyze scrobbles that already have sentiment data",
+        )
+
+    def handle(self, *args, **options):
+        commit = options["commit"]
+        overwrite = options["overwrite"]
+
+        qs = Scrobble.objects.filter(
+            ~models.Q(log__notes__isnull=True)
+            & ~models.Q(log__notes=[])
+            & ~models.Q(log__notes={})
+        )
+        if not overwrite:
+            qs = qs.filter(log__sentiment__isnull=True)
+
+        total = qs.count()
+        analyzed_count = 0
+        skipped_count = 0
+
+        self.stdout.write(f"Found {total} scrobbles to process")
+
+        for scrobble in qs.iterator():
+            if commit:
+                analyzed = analyze_scrobble_sentiment(scrobble, overwrite=overwrite)
+            else:
+                notes_str = ""
+                if scrobble.logdata:
+                    notes_str = scrobble.logdata.notes_as_str()
+                analyzed = bool(notes_str)
+
+            if analyzed:
+                analyzed_count += 1
+                if commit:
+                    scores = (scrobble.log or {}).get("sentiment", {})
+                    self.stdout.write(
+                        f"  Updated scrobble {scrobble.id}: compound={scores.get('compound', 'N/A')}"
+                    )
+                else:
+                    self.stdout.write(
+                        f"  [DRY RUN] Would analyze scrobble {scrobble.id}"
+                    )
+            else:
+                skipped_count += 1
+
+        self.stdout.write(
+            f"\nAnalyzed {analyzed_count} scrobbles, skipped {skipped_count}"
+        )
+        if not commit:
+            self.stdout.write("Run with --commit to persist changes")