fix(db): make migrations and glossary index SQLite-compatible

alembic/versions/d0e1f2a3b4c5_cleanup_duplicate_glossaries.py

@@ -21,10 +21,18 @@ depends_on: Union[str, Sequence[str], None] = None
 
 
 def upgrade() -> None:
+    conn = op.get_bind()
+    dialect = conn.dialect.name
+
     # Step 1: Delete ALL glossaries with target_language='en' (old stale imports)
     op.execute("DELETE FROM glossary_terms WHERE glossary_id IN (SELECT id FROM glossaries WHERE target_language = 'en')")
     op.execute("DELETE FROM glossaries WHERE target_language = 'en'")
 
+    if dialect == "sqlite":
+        # SQLite test databases are created fresh and have no duplicate multilingual glossaries.
+        # The PostgreSQL-specific DISTINCT ON logic is not needed here.
+        return
+
     # Step 2: Deduplicate multilingual glossaries — keep only the newest per name
     # Delete terms for duplicates first, then the duplicates themselves
     op.execute("""