CLI: streamline startup paths and env parsing

Add shared parseBooleanValue()/isTruthyEnvValue() and apply across CLI, gateway, memory, and live-test flags for consistent env handling.
Introduce route-first fast paths, lazy subcommand registration, and deferred plugin loading to reduce CLI startup overhead.
Centralize config validation via ensureConfigReady() and add config caching/deferred shell env fallback for fewer IO passes.
Harden logger initialization/imports and add focused tests for argv, boolean parsing, frontmatter, and CLI subcommands.

src/cli/run-main.ts

@@ -8,6 +8,8 @@ import { ensureClawdbotCliOnPath } from "../infra/path-env.js";
 import { assertSupportedRuntime } from "../infra/runtime-guard.js";
 import { installUnhandledRejectionHandler } from "../infra/unhandled-rejections.js";
 import { enableConsoleCapture } from "../logging.js";
+import { hasHelpOrVersion } from "./argv.js";
+import { tryRouteCli } from "./route.js";
 
 export function rewriteUpdateFlagArgv(argv: string[]): string[] {
   const index = argv.indexOf("--update");
@@ -29,6 +31,8 @@ export async function runCli(argv: string[] = process.argv) {
   // Enforce the minimum supported runtime before doing any work.
   assertSupportedRuntime();
 
+  if (await tryRouteCli(argv)) return;
+
   const { buildProgram } = await import("./program.js");
   const program = buildProgram();