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dborup
b3c3b0d17a
channelKeys and regionKeys (derived from config.json's hashChannels/
hashRegions) were loaded exactly once in main() and held in plain
maps for the process lifetime — adding a new hashtag channel or
region required a full ingestor restart to take effect, which also
resets the in-memory relay/scope-attribution state built up since the
last restart (see the Repeaters-by-Region cold-start discussion).
Wraps both maps in atomic.Pointer-backed hotKeys (same pattern already
used for Config.NodeBlacklist, just actually wired to a trigger this
time) and adds a SIGHUP handler that re-reads config.json and
atomically swaps in freshly-derived keys:
kill -HUP <ingestor-pid>
On a malformed config during reload, the previous keys are kept and
the error is logged — a bad edit must not blank out a working
ingestor. The MQTT message-handler closure now pulls a fresh snapshot
from the atomic pointers per message instead of closing over a static
map, so no other call sites needed to change.