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

The nine Capture tables (files, jobs, folders, shares, links, quota, cookies, profiles, library
resume points) leave app/models.py for the unit's own module; app.tables registers every unit's
tables for the migrations, the test database and the ownership check. No schema change.

backend/app/routes/downloads.py

@@ -33,7 +33,8 @@ from app.downloads import quota, service, storage
 from app.downloads import urlguard
 from app.downloads.folders import FolderKind
 from app.downloads.status import FINISHED, NOT_REFETCHABLE, JobStatus
-from app.models import (
+from app.models import User, display_text
+from app.downloads.models import (
     DownloadJob,
     DownloadLink,
     FileFolder,
@@ -42,8 +43,6 @@ from app.models import (
     DownloadShare,
     LibraryState,
     MediaAsset,
-    User,
-    display_text,
 )
 from app.routes._common import (
     ProgressIn,

backend/app/routes/files.py

@@ -44,16 +44,14 @@ from app.downloads import folders, preview, quota, service, storage
 from app.downloads import upload as uploadmod
 from app.downloads.status import JobStatus
 from app.mailtext import lang_for_user
-from app.models import (
-    DISPLAY_TEXT_MAX,
+from app.models import DISPLAY_TEXT_MAX, User, display_text
+from app.downloads.models import (
     DownloadJob,
     DownloadLink,
     DownloadShare,
     FileFolder,
     LibraryState,
     MediaAsset,
-    User,
-    display_text,
 )
 from app.refusal import refused
 from app.routes._common import capped_stream_to, not_found, owned_or_404

backend/app/routes/public.py

@@ -17,7 +17,8 @@ from app.db import get_db
 from app.downloads import links as linksmod
 from app.downloads import storage
 from app.downloads.status import JobStatus
-from app.models import DownloadJob, DownloadLink, FileFolder, MediaAsset, User
+from app.models import User
+from app.downloads.models import DownloadJob, DownloadLink, FileFolder, MediaAsset
 from app.ratelimit import RateLimiter, client_key
 from app.security import verify_password
 from app.refusal import refused

backend/app/routes/tokens.py

@@ -22,7 +22,8 @@ from app.audit import AuditAction
 from app.auth import current_user
 from app.db import get_db
 from app.downloads import folders
-from app.models import ApiToken, ApiTokenGrant, FileFolder, User
+from app.models import ApiToken, ApiTokenGrant, User
+from app.downloads.models import FileFolder
 from app.refusal import refused
 from app.routes._common import owned_or_404
 from app.security import hash_token