Task 1.4. The foundation set only — a seat's streams come at registration
and a module's consumers at assignment, neither of which has happened at
genesis (ADR 0118).
Asserted rather than created: a stream that was deleted, or a mesh raised
from a backup, must converge rather than run without the guarantee its
messages assume.
Two things the definitions have to get right, both tested:
- CONTROL names its subjects instead of taking mesh.control.>, because
heartbeats live under that prefix and a stream of them competes for
retention with the messages that matter
- EVENTS filters on the event token, which is why that token exists; a
filter over a module's whole namespace would persist every tool call
Overlapping filters are refused where the set is written: NATS accepts two
streams matching one subject and stores the message twice under two
retentions, which nothing reports.
Adds nats.go as a dependency; it pulled golang.org/x/* forward. Full suite
green.