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/hooks/frontmatter.test.ts

@@ -1,5 +1,9 @@
 import { describe, expect, it } from "vitest";
-import { parseFrontmatter, resolveClawdbotMetadata } from "./frontmatter.js";
+import {
+  parseFrontmatter,
+  resolveClawdbotMetadata,
+  resolveHookInvocationPolicy,
+} from "./frontmatter.js";
 
 describe("parseFrontmatter", () => {
   it("parses single-line key-value pairs", () => {
@@ -273,3 +277,14 @@ metadata:
     expect(clawdbot?.events).toEqual(["command:new"]);
   });
 });
+
+describe("resolveHookInvocationPolicy", () => {
+  it("defaults to enabled when missing", () => {
+    expect(resolveHookInvocationPolicy({}).enabled).toBe(true);
+  });
+
+  it("parses enabled flag", () => {
+    expect(resolveHookInvocationPolicy({ enabled: "no" }).enabled).toBe(false);
+    expect(resolveHookInvocationPolicy({ enabled: "on" }).enabled).toBe(true);
+  });
+});