refactor(reader): the unit's tables move into reader/models

VideoState, Playlist, PlaylistItem, SavedView, ComfortPin, Tag and ChannelTag leave app/models.py
for app/reader/models.py; app.tables registers them. No schema change.

backend/app/routes/channels.py

@@ -19,15 +19,12 @@ from app.models import (
     LIVE_OR_UPCOMING,
     BlockedChannel,
     Channel,
-    ChannelTag,
     ExploredChannel,
-    Playlist,
-    PlaylistItem,
     Subscription,
-    Tag,
     User,
     Video,
 )
+from app.reader.models import ChannelTag, Playlist, PlaylistItem, Tag
 from app.routes._common import get_or_404, not_found, owned_or_404, youtube_refusal
 from app.sync.explore import explore_ingest_page
 from app.sync.runner import backfill_channel_now, run_recent_backfill

backend/app/routes/discover.py

@@ -22,7 +22,8 @@ from app.db import get_db
 from app.discover import hero as hero_mod
 from app.discover import pins, rails
 from app.discover.budget import Budget, DEFAULT_BUDGET
-from app.models import ComfortPin, User
+from app.models import User
+from app.reader.models import ComfortPin
 from app.plex.cards import norm_lang
 from app.routes._common import owned_or_404, not_found
 

backend/app/routes/feed.py

@@ -25,13 +25,8 @@ from app.feedquery import (
     windowed_rank,
     windowed_relevance_rows,
 )
-from app.models import (
-    ChannelTag,
-    Tag,
-    User,
-    Video,
-    VideoState,
-)
+from app.models import User, Video
+from app.reader.models import ChannelTag, Tag, VideoState
 from app.routes._common import (
     ProgressIn,
     get_or_404,

backend/app/routes/playlists.py

@@ -12,7 +12,8 @@ from app import quota
 from app.auth import current_user, has_read_scope, has_write_scope, require_write_scope
 from app.db import get_db
 from app.feedquery import feed_columns, serialize
-from app.models import Channel, Playlist, PlaylistItem, User, Video, VideoState
+from app.models import Channel, User, Video
+from app.reader.models import Playlist, PlaylistItem, VideoState
 from app.sync.playlists import (
     PlaylistGone,
     lock_playlists,

backend/app/routes/saved_views.py

@@ -6,7 +6,8 @@ from sqlalchemy.orm import Session
 
 from app.auth import current_user
 from app.db import get_db
-from app.models import SavedView, User
+from app.models import User
+from app.reader.models import SavedView
 from app.routes._common import owned_or_404
 from app.refusal import refused
 

backend/app/routes/search.py

@@ -29,14 +29,12 @@ from app.models import (
     LIVE_OR_UPCOMING,
     BlockedChannel,
     Channel,
-    Playlist,
-    PlaylistItem,
     SearchFind,
     Subscription,
     User,
     Video,
-    VideoState,
 )
+from app.reader.models import Playlist, PlaylistItem, VideoState
 from app.feedquery import feed_columns, serialize
 from app.utils import like_escape
 from app.sync.subscriptions import apply_channel_details

backend/app/routes/tags.py

@@ -6,7 +6,8 @@ from sqlalchemy.orm import Session
 
 from app.auth import current_user
 from app.db import get_db
-from app.models import ChannelTag, Tag, User
+from app.models import User
+from app.reader.models import ChannelTag, Tag
 from app.routes._common import owned_or_404
 from app.sync.tagsuggest import compute_tag_suggestions
 from app.refusal import refused