chore: update similarity cache [29629 cards, 542626 entries, 2.8MB, built 2026-03-23T23:52:44.637444]

README-cache.md

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+# Similarity Cache Data
+This branch contains pre-built similarity cache files for the MTG Deckbuilder.
+Updated automatically by GitHub Actions.
+
+## Files
+- `card_files/similarity_cache.parquet` - Pre-computed card similarity cache
+- `card_files/similarity_cache_metadata.json` - Cache metadata
+- `card_files/processed/all_cards.parquet` - Tagged card database (with prices)
+- `card_files/processed/commander_cards.parquet` - Commander-only cache (fast lookups)
+- `card_files/processed/.tagging_complete.json` - Tagging status
+- `card_files/prices_cache.json` - Scryfall price cache
+- `card_files/prices_cache.json.ts` - Per-card price timestamps (if present)

card_files/processed/.tagging_complete.json

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+{
+  "completed_at": "2026-03-23T23:52:12+00:00",
+  "mode": "SEQUENTIAL",
+  "parallel": false,
+  "duration_seconds": 26.253941
+}

card_files/similarity_cache_metadata.json

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+{
+  "version": "2.0",
+  "total_cards": 29629,
+  "total_entries": 542626,
+  "build_date": "2026-03-23T23:52:44.637444",
+  "last_updated": "2026-03-24T00:02:20.448872",
+  "threshold": 0.8,
+  "min_results": 3,
+  "build_complete": true
+}