Replace image pipeline with profile-driven variants

- add image normalization profiles and thumbnail profiles
- generate source, full-size variant, and thumbnail image artifacts
- rewrite canonical image URLs through the first configured profile
- emit explicit image Media RSS groups with named thumbnails
- preserve legacy image paths when image conversion is disabled
- cover cache-hit source paths, inline image handling, and thumbnail export

repub/items.py

@@ -1,4 +1,4 @@
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from typing import Any, List, TypedDict
 
 
@@ -8,7 +8,7 @@ class MediaVariant(TypedDict, total=False):
     type: str
     medium: str
     isDefault: str
-    fileSize: str
+    fileSize: int | str
     bitrate: int | float | str
     samplingrate: int | str
     channels: int | str
@@ -29,18 +29,39 @@ class TranscodedMediaFile(TypedDict):
     variants: List[MediaVariant]
 
 
+class ThumbnailVariant(TypedDict, total=False):
+    url: str
+    path: str
+    width: int | str
+    height: int | str
+    slot: str
+    type: str
+
+
+class TranscodedImageFile(TypedDict):
+    url: str
+    path: str
+    checksum: str | None
+    status: str
+    published_url: str
+    source_path: str
+    variants: List[MediaVariant]
+    thumbnails: List[ThumbnailVariant]
+
+
 @dataclass
 class ElementItem:
     feed_name: str
     el: Any
     image_urls: List[str]
-    images: List[Any]
+    images: List[TranscodedImageFile]
     file_urls: List[str]
     files: List[Any]
     audio_urls: List[str]
     audios: List[TranscodedMediaFile]
     video_urls: List[str]
     videos: List[TranscodedMediaFile]
+    media_image_urls: List[str] = field(default_factory=list)
 
 
 @dataclass
@@ -48,4 +69,5 @@ class ChannelElementItem:
     feed_name: str
     el: Any
     image_urls: List[str]
-    images: List[Any]
+    images: List[TranscodedImageFile]
+    media_image_urls: List[str] = field(default_factory=list)