A subscription pulled in from YouTube left an explored channel flagged as an exploration's, so its
later videos came in hidden from the Library with their watched marks waiting for good; a subscribe
landing while an exploration's videos came in left those flagged too. One step, settle_explored,
now holds the rule by who follows the channel now: the subscribe here, the subscription import, the
watched-channel videos and the explore page all end with it. Migration 0116 clears what the gap
left behind.
The list's "may still grow" count no longer counts a channel it already shows from a stub row, and
the comments on the cleanup's keep rule and on the in-memory daily shares say what they do.
- A channel someone follows: the videos its exploration brings in (the list's
dialog, the channel page's explore) come in as the catalog's own, not
flagged via_explore, which subscribing would never clear and which kept
their watched marks waiting for good.
- The explore cleanup keeps the row of a channel a Takeout history shows
watched (it still reclaims the videos), so a looked-at channel no longer
drops off the list.
- The Shorts job takes up only users whose list still has lengths to ask or
channels to name, by each user's own follows, blocks and dismissals; a
naming that failed is tried again, and the list says it is not complete.
- The length lookups have a daily share of their own: a large history no
longer leaves the export's Watch later file waiting a day.
- Only a channel of the user's own history can be put out of the list.
- The dialog's videos have a query root of their own: the list's
invalidations no longer re-ask (and re-explore) under an open dialog.
Channels, search and sync do no database work in their routes any more: reads go through
catalog/queries, writes through catalog/service, and a live search's ingest is catalog/search.
What a catalog route needs from Reader (a playlist's channels, a user's tag links, the feed
projection of results) it asks reader/queries and reader/service. The scheduler and the runs page
read channel titles and the work queue through catalog/queries. Catalog is fenced below its HTTP
layer: its owner filters go through userscope, it reads no other unit's tables, and its ingest
jobs commit only where they are named.
peter