Add QR pairing (terminal QR, in-app scanner, iris://pair deep link)

gateway-plugin/media.py

@@ -15,7 +15,7 @@ binary frames. Delivery-path security via ``validate_media_delivery_path``
 
 Reuses hermes ``cache_image/audio/video/document_from_bytes`` + the
 ``_looks_like_image`` / ``sniff_container`` magic-byte sniffers. Temp files
-live under ``get_hermes_home()/"android"/media/tmp``.
+live under ``get_hermes_home()/"iris"/media/tmp``.
 
 Milestone M4.
 """
@@ -231,7 +231,7 @@ class UploadSession:
         self.failed = True
         self.error_code = code
         self.error_message = message
-        logger.warning("android: upload %s failed: %s", self.media_ref, message)
+        logger.warning("iris: upload %s failed: %s", self.media_ref, message)
 
     def digest(self) -> str:
         return self._sha.hexdigest()
@@ -262,7 +262,7 @@ class MediaStore:
     """
 
     def __init__(self, hermes_home: Path):
-        self._tmp_dir = hermes_home / "android" / "media" / "tmp"
+        self._tmp_dir = hermes_home / "iris" / "media" / "tmp"
         self._tmp_dir.mkdir(parents=True, exist_ok=True)
         self._lock = threading.Lock()
         # (device_id, media_ref) -> UploadSession (one active per device)
@@ -374,7 +374,7 @@ class MediaStore:
             with self._lock:
                 self._inbound[media_ref] = entry
             logger.info(
-                "android: upload %s cached as %s (%s, %d bytes)",
+                "iris: upload %s cached as %s (%s, %d bytes)",
                 media_ref,
                 kind,
                 path,