fix: standardize brand capitalization as PIGWay

docs/REAL_DEVICE_TEST.md

@@ -9,7 +9,7 @@
    duplicates, name/date/dimensions anomalies. No download-all action.
 3. Stop on discrepancy. Missing model fields must be reported as unavailable.
 4. Once explicitly authorized, locally render **one** 1200×1600 test image containing
-   PIGWAY FRAME FLOW TEST and Shanghai timestamp, no private content.
+   PIGWay Frame Flow TEST and Shanghai timestamp, no private content.
 5. Record an operation ID and previous image; one upload only, no write retries.
 6. Poll device read-only no more often than 60 seconds, respecting the 20/min budget.
    Confirm imageId and synced. If sent but response lost, mark UNKNOWN, block writes,