docs(agent): 补全会话与对话设计

script/sql/agent_capability_binding.sql

@@ -0,0 +1,23 @@
+-- Agent 与 Workflow 能力绑定表。
+
+CREATE TABLE IF NOT EXISTS agent_capability_binding (
+    id BIGSERIAL PRIMARY KEY,
+    owner_type VARCHAR(50) NOT NULL,
+    owner_id BIGINT NOT NULL,
+    capability_type VARCHAR(50) NOT NULL,
+    capability_id BIGINT NOT NULL,
+    enabled BOOLEAN NOT NULL DEFAULT TRUE,
+    config_json JSONB NOT NULL DEFAULT '{}'::jsonb,
+    version INTEGER NOT NULL DEFAULT 1,
+    create_time TIMESTAMP,
+    update_time TIMESTAMP,
+    remark VARCHAR(500) DEFAULT '',
+    create_by VARCHAR(64),
+    update_by VARCHAR(64),
+    CONSTRAINT uk_agent_capability_binding UNIQUE (owner_type, owner_id, capability_type, capability_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_agent_capability_owner ON agent_capability_binding (owner_type, owner_id);
+CREATE INDEX IF NOT EXISTS idx_agent_capability_type ON agent_capability_binding (capability_type, capability_id);
+
+COMMENT ON TABLE agent_capability_binding IS 'Agent能力绑定表';