feat(v2): add LBA snapshot extractor and command

apps/ingestion/management/commands/run_lba_extractor.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+from django.core.management.base import BaseCommand, CommandError
+from django.utils.dateparse import parse_date
+
+from apps.ingestion.extractors import ExtractorError, create_extractor
+
+
+class Command(BaseCommand):
+    help = "Run only the LBA extractor and emit an import-ready snapshot JSON."
+
+    def add_arguments(self, parser):
+        parser.add_argument(
+            "--output-path",
+            dest="output_path",
+            default=None,
+            help="Directory or .json path to write output (default incoming dir).",
+        )
+        parser.add_argument(
+            "--snapshot-date",
+            dest="snapshot_date",
+            default=None,
+            help="Override snapshot date in YYYY-MM-DD format.",
+        )
+        parser.add_argument(
+            "--dry-run",
+            action="store_true",
+            help="Validate without writing output.",
+        )
+        parser.add_argument(
+            "--indent",
+            type=int,
+            default=2,
+            help="JSON indent level for emitted file.",
+        )
+
+    def handle(self, *args, **options):
+        snapshot_date = None
+        if options["snapshot_date"]:
+            snapshot_date = parse_date(options["snapshot_date"])
+            if snapshot_date is None:
+                raise CommandError("--snapshot-date must be YYYY-MM-DD.")
+
+        try:
+            extractor = create_extractor("lba")
+            result = extractor.run(
+                output_path=options["output_path"],
+                snapshot_date=snapshot_date,
+                write_output=not options["dry_run"],
+                indent=options["indent"],
+            )
+        except ExtractorError as exc:
+            raise CommandError(str(exc)) from exc
+
+        output = str(result.output_path) if result.output_path else "<dry-run>"
+        self.stdout.write(
+            self.style.SUCCESS(
+                f"LBA extractor completed: source={result.source_name} "
+                f"date={result.snapshot_date} records={result.records_count} output={output}"
+            )
+        )