This reverts commit da2bdad18d.
This commit was reverted because it was causing crashes (Occasional `EXC_BAD_ACCESS` errors when accessing database transactions), and because the push notification extension uses Ndb in a read-only manner, which means we no longer need these changes
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>
Otherwise iOS gets mad because we are holding onto a lockfile in a
shared container which is apparently not allowed.
Fixes: a1e6be214e ("Migrate NostrDB files to shared app group file container")
Many different parts of the codebase could be opening transactions when
somewhere higher in the heirarchy on the main thread might already have
an active transaction. This can lead to failed transaction opening which
is bad.
Instead of relying on passing down the transaction to subviews, lets
keep track of the active transactions in a thread-local dictionary. That
way whenever we create a new transaction we can inherit the one that is
already active in the current thread.
Inherited transactions don't end the query when they are garbage
collected, we still expect the first-opened query to do this.
