fix(gate-b): fresh-db install path - conditional guards on plugin-table migrations + dual-path convergence migrations

app/plugins/builtins/automation/migrations/0004_run_steps_phase_f.sql

@@ -0,0 +1,31 @@
+-- Dual-path convergence (Gate B): create the ReAct step-tracking table
+-- that Alembic migration 0121 creates on the core path, add the Phase-F
+-- columns from 0122, and apply the RLS policy from 0129/0136. Idempotent
+-- so both install paths converge to the identical schema.
+CREATE TABLE IF NOT EXISTS automation_agent_run_steps (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL,
+    agent_run_id UUID NOT NULL REFERENCES automation_agent_runs(id) ON DELETE CASCADE,
+    step_number INTEGER NOT NULL,
+    thought TEXT,
+    action VARCHAR(255),
+    action_input JSONB,
+    observation TEXT,
+    cost_usd FLOAT NOT NULL DEFAULT 0.0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+CREATE INDEX IF NOT EXISTS ix_agent_run_steps_run ON automation_agent_run_steps(tenant_id, agent_run_id);
+
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS temperature FLOAT NOT NULL DEFAULT 0.3;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS max_tokens INTEGER NOT NULL DEFAULT 1000;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS max_steps INTEGER NOT NULL DEFAULT 20;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS trace_mode VARCHAR(20) NOT NULL DEFAULT 'standard';
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS skill_ids JSONB NOT NULL DEFAULT '[]'::jsonb;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS trigger_config JSONB NOT NULL DEFAULT '{}'::jsonb;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS ai_use_case_metadata JSONB NOT NULL DEFAULT '{}'::jsonb;
+
+-- RLS matching migrations 0129 + 0136 (current_tenant_id variant)
+ALTER TABLE automation_agent_run_steps ENABLE ROW LEVEL SECURITY;
+DROP POLICY IF EXISTS tenant_isolation ON automation_agent_run_steps;
+CREATE POLICY tenant_isolation ON automation_agent_run_steps
+    USING (tenant_id::text = current_setting('app.current_tenant_id', true));