feat: enhance EvoBGP with new command-line options for the evobgp-agent, including a watch command for periodic configuration updates. Update go.mod with additional dependencies and improve Docker Compose setup for new services, including NATS and various worker components.

migrations/postgres/000002_speaker_publish.up.sql

@@ -0,0 +1,5 @@
+-- Published revision pointer for evobgp-node (plan §7.11, §10).
+
+ALTER TABLE bgp_speaker
+    ADD COLUMN IF NOT EXISTS published_revision_id UUID REFERENCES config_revision (id) ON DELETE SET NULL,
+    ADD COLUMN IF NOT EXISTS published_at TIMESTAMPTZ;