refactor: Token-Tracking mit source=globe fuer Split-Anzeige

UNIQUE-Constraint um source-Spalte erweitert, Globe schreibt
jetzt mit source=globe in token_usage_monthly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/data_vlm.py

@@ -480,10 +480,10 @@ async def analyze_image(
                     year_month = datetime.now(timezone.utc).strftime('%Y-%m')
                     await db.execute("""
                         INSERT INTO token_usage_monthly
-                            (organization_id, year_month, input_tokens, output_tokens,
+                            (organization_id, year_month, source, input_tokens, output_tokens,
                              cache_creation_tokens, cache_read_tokens, total_cost_usd, api_calls, refresh_count)
-                        VALUES (?, ?, ?, ?, ?, ?, ?, 1, 1)
-                        ON CONFLICT(organization_id, year_month) DO UPDATE SET
+                        VALUES (?, ?, 'globe', ?, ?, ?, ?, ?, 1, 1)
+                        ON CONFLICT(organization_id, year_month, source) DO UPDATE SET
                             input_tokens = input_tokens + excluded.input_tokens,
                             output_tokens = output_tokens + excluded.output_tokens,
                             cache_creation_tokens = cache_creation_tokens + excluded.cache_creation_tokens,