phase 17: fix text[]/varchar[] type mismatch in coverage-gaps SQL

.kiro/specs/stonks-oracle/tasks.md

@@ -174,7 +174,7 @@
 
 ## Phase 17 - First Vertical Slice: Live Pipeline End-to-End
 
-- [-] 17. Activate the full data pipeline for a set of tracked symbols
+- [x] 17. Activate the full data pipeline for a set of tracked symbols
 - [x] 17.1 Seed initial symbols and configure sources via the dashboard
   - Use the dashboard Companies page to add 5-10 symbols (e.g. AAPL, MSFT, GOOGL, AMZN, TSLA, NVDA, META, JPM, V, UNH)
   - For each company, add sources via the Company Detail → Sources tab: one `market_api` source (Polygon), one `news_api` source, one `filings_api` source
@@ -216,7 +216,7 @@
   - Check the dashboard Trends page shows trend cards with real data
   - _Requirements: 7.1, 7.2, 7.3_
 
-- [-] 17.6 Validate recommendation engine produces paper-trade recommendations
+- [x] 17.6 Validate recommendation engine produces paper-trade recommendations
   - Check recommendation worker logs for recommendation generation
   - Verify `recommendations` table has entries with action, confidence, thesis
   - Verify `recommendation_evidence` links recommendations to documents
@@ -224,14 +224,14 @@
   - Check the dashboard Recommendations page shows real recommendations
   - _Requirements: 8.1, 8.2, 8.3_
 
-- [ ] 17.7 Validate lake publisher writes analytical facts to MinIO/Trino
+- [x] 17.7 Validate lake publisher writes analytical facts to MinIO/Trino
   - Check lake-publisher worker logs for Parquet writes
   - Verify MinIO `stonks-lakehouse` bucket has partitioned Parquet files
   - Verify Trino can query the lakehouse tables via the SQL Explorer page
   - Test a sample query: `SELECT * FROM lakehouse.stonks.documents LIMIT 10`
   - _Requirements: 10.1, 10.2, 10.3_
 
-- [ ] 17.8 Validate dashboard shows live data across all pages
+- [x] 17.8 Validate dashboard shows live data across all pages
   - Verify Home page shows non-zero metrics (active companies, documents, recommendations)
   - Verify Companies page lists seeded companies with source counts
   - Verify Documents page shows ingested documents with parse quality badges

services/api/app.py

@@ -1479,8 +1479,8 @@ async def get_source_coverage_gaps():
             LEFT JOIN sources s ON s.company_id = c.id AND s.active = TRUE
             WHERE c.active = TRUE
             GROUP BY c.id, c.ticker, c.legal_name, c.sector
-            HAVING NOT ARRAY['market_api', 'news_api', 'filings_api'] <@ ARRAY_AGG(DISTINCT s.source_type) FILTER (WHERE s.active)
-                OR ARRAY_AGG(DISTINCT s.source_type) FILTER (WHERE s.active) IS NULL
+            HAVING NOT ARRAY['market_api', 'news_api', 'filings_api']::text[] <@ ARRAY_AGG(DISTINCT s.source_type::text) FILTER (WHERE s.active)
+                OR ARRAY_AGG(DISTINCT s.source_type::text) FILTER (WHERE s.active) IS NULL
             ORDER BY c.ticker""",
     )