fix(partner-mismatch): fix 3 infinite-loop bugs in mismatch detection cycle

Three root causes caused partner_mismatch=1 to loop indefinitely:

1. No-CUI company orders (is_pj=1, no cod_fiscal): old code flagged as
   mismatch every cycle. Fixed by requiring new_cf to be non-null for
   PF→PJ detection. Stale flags from old code cleared via new
   clear_stale_partner_mismatches_no_cui() for out-of-window orders.

2. same_partner resync path did not update cod_fiscal_gomag in SQLite.
   On next cycle GoMag returned a CUI but stored_cf was still NULL →
   re-detected as mismatch. Fixed by also calling update_partner_resync_data
   (not just update_partner_mismatch_batch) in the same_partner branch.

3. GoMag sends CUI with space: 'RO 17922480'. The _strip_ro() regex
   ^RO left the space → ' 17922480' != '17922480' → false mismatch.
   Fixed: changed regex to ^RO\s* and added .strip().

Also adds diagnostic logger.info lines for mismatch detection/resync counts.

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

api/app/services/sqlite_service.py

@@ -1440,6 +1440,36 @@ async def update_partner_mismatch_batch(updates: list) -> None:
         await db.close()
 
 
+async def clear_stale_partner_mismatches_no_cui(exclude_numbers: set) -> int:
+    """Clear partner_mismatch=1 for orders with cod_fiscal_gomag=NULL that are NOT in the
+    current sync batch. These were flagged by old code (before the no-CUI fix) and will
+    never self-correct because they fall outside the active sync window.
+    Returns number of rows cleared.
+    """
+    db = await get_sqlite()
+    try:
+        if exclude_numbers:
+            placeholders = ",".join("?" * len(exclude_numbers))
+            sql = f"""
+                UPDATE orders SET partner_mismatch = 0, updated_at = datetime('now')
+                WHERE partner_mismatch = 1
+                  AND cod_fiscal_gomag IS NULL
+                  AND order_number NOT IN ({placeholders})
+            """
+            await db.execute(sql, list(exclude_numbers))
+        else:
+            await db.execute("""
+                UPDATE orders SET partner_mismatch = 0, updated_at = datetime('now')
+                WHERE partner_mismatch = 1 AND cod_fiscal_gomag IS NULL
+            """)
+        await db.commit()
+        cursor = await db.execute("SELECT changes()")
+        row = await cursor.fetchone()
+        return row[0] if row else 0
+    finally:
+        await db.close()
+
+
 async def update_partner_resync_data(order_number: str, data: dict) -> None:
     """Update partner fields + clear partner_mismatch after a successful resync."""
     db = await get_sqlite()