feat(learn): new rows of a shared studyset go in its space

ADR 0044, D24, step 4's routing. `SpaceRouter` answers the sync engine's
`newRowSpace`: a studyset's cards, notes, paths, PDFs and their
revisions go in the space the studyset is in, a topic in its parent's,
a studyset placed for a share (`placeIn`) in its space, and a file in
the space its key is for; everything else, reviews and tags among them
(D2, D25, D26), stays the person's own. Which studysets are shared is
read from the engine's grants and kept until a sync brings changes.

A shared space's key has an ID of its own, `SpaceKeyId`
(`h1.<space>.<ms>.<nonce>`), which `ContentKeyId` reads as none of its
own, so no `content_key` row passes for one.

No studyset is shared yet: until one is, every row goes in the person's
space as before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
This commit is contained in:
Tizian 「ティツィアーン」 2026-11-11 13:00:38 +01:00
commit 92b87e218d
Signed by: raisondetredev
GPG key ID: 07F6FCF405488B64

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