feat(sync): add SSE live feed, unified logs page, fix Oracle connection

- Add SSE event bus in sync_service (subscribe/unsubscribe/_emit)
- Add GET /api/sync/stream SSE endpoint for real-time sync progress
- Rewrite logs.html: unified runs table + live feed + summary + filters
- Rewrite logs.js: SSE EventSource client, run selection, pagination
- Dashboard: clickable runs navigate to /logs?run=, sync started banner
- Remove "Import Comenzi" nav item, delete sync_detail.html
- Add error_message column to sync_runs table with migration
- Fix: export TNS_ADMIN as OS env var so oracledb finds tnsnames.ora
- Fix: use get_oracle_connection() instead of direct pool.acquire()
- Fix: CRM_POLITICI_PRET_ART INSERT to match actual table schema

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

api/app/services/sqlite_service.py

@@ -20,7 +20,8 @@ async def create_sync_run(run_id: str, json_files: int = 0):
 
 
 async def update_sync_run(run_id: str, status: str, total_orders: int = 0,
-                          imported: int = 0, skipped: int = 0, errors: int = 0):
+                          imported: int = 0, skipped: int = 0, errors: int = 0,
+                          error_message: str = None):
     """Update sync run with results."""
     db = await get_sqlite()
     try:
@@ -31,9 +32,10 @@ async def update_sync_run(run_id: str, status: str, total_orders: int = 0,
                 total_orders = ?,
                 imported = ?,
                 skipped = ?,
-                errors = ?
+                errors = ?,
+                error_message = ?
             WHERE run_id = ?
-        """, (status, total_orders, imported, skipped, errors, run_id))
+        """, (status, total_orders, imported, skipped, errors, error_message, run_id))
         await db.commit()
     finally:
         await db.close()