Every metadata call site previously built its own command list. The new
ytsage/core/ytsage_client.py centralizes binary resolution (managed,
verified binary only), cookie/proxy args from ConfigManager (with
session-state overrides), utf-8 output handling, process-group-safe
timeouts, and a short-TTL cache for flat/search results.
Provides fetch_video_info, fetch_flat_info, fetch_flat_entries (with
-I range pagination), search (ytsearchN:), and fetch_account_feed
(youtube.com/feed/subscriptions with cookies) plus a generic YtdlpWorker
QThread. AnalysisThread now delegates its subprocess execution to the
shared runner; its signal surface is unchanged.
Groundwork for the SageTube watch/search/browse/feed features.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Jaroslav Beneš