refactor: rename container references to agent across codebase

- container-runner.ts → agent-runner.ts
- ContainerInput/Output → AgentInput/Output
- ContainerConfig → AgentConfig
- runContainerAgent → runAgentProcess
- CONTAINER_TIMEOUT → AGENT_TIMEOUT (with env fallback)
- MAX_CONCURRENT_CONTAINERS → MAX_CONCURRENT_AGENTS
- containerName → processName, isTaskContainer → isTaskProcess
- DB column container_config kept as-is (backwards compat)

src/ipc.ts

@@ -4,7 +4,7 @@ import path from 'path';
 import { CronExpressionParser } from 'cron-parser';
 
 import { DATA_DIR, IPC_POLL_INTERVAL, TIMEZONE } from './config.js';
-import { AvailableGroup } from './container-runner.js';
+import { AvailableGroup } from './agent-runner.js';
 import { createTask, deleteTask, getTaskById, updateTask } from './db.js';
 import { isValidGroupFolder } from './group-folder.js';
 import { logger } from './logger.js';
@@ -170,7 +170,7 @@ export async function processTaskIpc(
     folder?: string;
     trigger?: string;
     requiresTrigger?: boolean;
-    containerConfig?: RegisteredGroup['containerConfig'];
+    agentConfig?: RegisteredGroup['agentConfig'];
   },
   sourceGroup: string, // Verified identity from IPC directory
   isMain: boolean, // Verified from directory path
@@ -438,7 +438,7 @@ export async function processTaskIpc(
           folder: data.folder,
           trigger: data.trigger,
           added_at: new Date().toISOString(),
-          containerConfig: data.containerConfig,
+          agentConfig: data.agentConfig,
           requiresTrigger: data.requiresTrigger,
         });
       } else {