feat(runtime): sync experience bus and learner stack into main

migrations/054_agent_experience_events.sql

@@ -0,0 +1,38 @@
+-- Phase-1: Router Experience Bus event store (append-only)
+
+CREATE TABLE IF NOT EXISTS agent_experience_events (
+    id BIGSERIAL PRIMARY KEY,
+    event_id UUID NOT NULL UNIQUE,
+    ts TIMESTAMPTZ NOT NULL,
+    node_id TEXT NOT NULL,
+    source TEXT NOT NULL,
+    agent_id TEXT NOT NULL,
+    task_type TEXT NOT NULL,
+    request_id TEXT NULL,
+    channel TEXT NOT NULL DEFAULT 'unknown',
+    inputs_hash TEXT NOT NULL,
+    provider TEXT NOT NULL,
+    model TEXT NOT NULL,
+    profile TEXT NULL,
+    latency_ms INT NOT NULL,
+    tokens_in INT NULL,
+    tokens_out INT NULL,
+    ok BOOLEAN NOT NULL,
+    error_class TEXT NULL,
+    error_msg_redacted TEXT NULL,
+    http_status INT NOT NULL,
+    raw JSONB NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_agent_experience_events_agent_ts
+    ON agent_experience_events (agent_id, ts DESC);
+
+CREATE INDEX IF NOT EXISTS idx_agent_experience_events_task_ts
+    ON agent_experience_events (task_type, ts DESC);
+
+CREATE INDEX IF NOT EXISTS idx_agent_experience_events_hash_ts
+    ON agent_experience_events (inputs_hash, ts DESC);
+
+CREATE INDEX IF NOT EXISTS idx_agent_experience_events_ok_ts
+    ON agent_experience_events (ok, ts DESC);