drop unnecessary trigram index on tests table

Author: DolceTriade

blade/db/postgres/migrations/2025-11-19-000100_drop_tests_name_trgm/down.sql

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+-- Rollback: Recreate trigram index on tests.name
+CREATE INDEX IF NOT EXISTS tests_name_trgm_idx ON tests USING GIN (name gin_trgm_ops);

blade/db/postgres/migrations/2025-11-19-000100_drop_tests_name_trgm/up.sql

@@ -0,0 +1,3 @@
+-- Drop trigram index on tests.name since we now search on unique_test_names table
+-- Keep the regular btree index (tests_name_idx) for joins and equality filters
+DROP INDEX IF EXISTS tests_name_trgm_idx;