Two bugs that together blackholed every reverse-PSS message from the
provider when the api ran more than one replica:
1) `pssKeys = generatePssKeypair()` ran per-container, so each replica
had a different ECIES identity. Provider encrypts its reply to ONE
of those keys, only that replica can decrypt — so two replicas =
~50% of chats hang forever.
2) `resolveSelfOverlay` swallowed errors and returned 0x00…00 when
Bee wasn't ready yet at boot. That zeroed overlay landed in the
gateway context AND in the job_notify envelope sent to the provider
— provider then sent PSS replies into the void.
Fix: load PSS key from PSS_KEY_PATH (shared volume across replicas);
retry getNodeAddresses up to 5 minutes and throw if still zero.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
