Fix Docker Swarm discovery network name mismatch

- Changed NetworkName from 'chorus_default' to 'chorus_net'
- This matches the actual network 'CHORUS_chorus_net' (service prefix added automatically)
- Fixes discovered_count:0 issue - now successfully discovering all 25 agents
- Updated IMPLEMENTATION-SUMMARY with deployment status

Result: All 25 CHORUS agents now discovered successfully via Docker Swarm API

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

migrations/009_add_council_persona_columns.up.sql

@@ -0,0 +1,12 @@
+-- Add persona tracking fields for council agents and brief metadata for councils
+
+ALTER TABLE council_agents
+    ADD COLUMN IF NOT EXISTS persona_status VARCHAR(50) NOT NULL DEFAULT 'pending',
+    ADD COLUMN IF NOT EXISTS persona_loaded_at TIMESTAMPTZ,
+    ADD COLUMN IF NOT EXISTS persona_ack_payload JSONB,
+    ADD COLUMN IF NOT EXISTS endpoint_url TEXT;
+
+ALTER TABLE councils
+    ADD COLUMN IF NOT EXISTS brief_owner_role VARCHAR(100),
+    ADD COLUMN IF NOT EXISTS brief_dispatched_at TIMESTAMPTZ,
+    ADD COLUMN IF NOT EXISTS activation_payload JSONB;