fix(right-wing): update DB with latest motions, fix DROP TABLE bug, score all missing 2D

- Fetched 276 new motions from Tweede Kamer API (2026-04-23 to 2026-05-31)
- Fixed classify_motions.py: DROP TABLE → CREATE TABLE IF NOT EXISTS
- Restored derived columns (centrist_support_strict, category, etc.) via migration
- Scored 180 missing motions in extremity_scores_2d (now 3,049 total, 0 missing)
- Re-ran temporal trajectory with updated data (inflection: 2024-Q2)

analysis/right_wing/classify_motions.py

@@ -130,11 +130,10 @@ def classify_motions(
 
     con = duckdb.connect(str(db))
     try:
-        # Create output table
-        con.execute("DROP TABLE IF EXISTS right_wing_motions")
+        # Create output table (idempotent — does not drop existing columns)
         con.execute(
             """
-            CREATE TABLE right_wing_motions (
+            CREATE TABLE IF NOT EXISTS right_wing_motions (
                 motion_id INTEGER PRIMARY KEY,
                 year INTEGER,
                 title VARCHAR,