v2: make v2 the main entry point, move v1 to src/v1/

- Move all v1 files (index, router, container-runner, db, ipc, types,
  logger, channels/registry, and all utilities) to src/v1/ as a
  fully self-contained archive with no shared dependencies
- Rename v2 files to remove -v2 suffix (index-v2.ts → index.ts, etc.)
- Update all imports across v2 source, tests, and setup files
- Migrate shared utilities (config, env, container-runtime, mount-security,
  timezone, group-folder) from pino logger to v2 log module
- Migrate setup/ files from logger to log with argument order swap
- Container agent-runner: move v1 entry to v1/, rename v2 to index.ts
- Update setup skill to offer all 13 v2 channels
- Install all Chat SDK adapter packages
- dist/index.js now runs v2; dist/v1/index.js runs v1

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/session-manager.ts

@@ -10,7 +10,7 @@ import { DATA_DIR } from './config.js';
 import { createSession, findSession, getSession, updateSession } from './db/sessions.js';
 import { log } from './log.js';
 import { SESSION_SCHEMA } from './db/schema.js';
-import type { Session } from './types-v2.js';
+import type { Session } from './types.js';
 
 /** Root directory for all session data. */
 export function sessionsBaseDir(): string {