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/memory/embeddings-gemini.ts

@@ -1,4 +1,5 @@
 import { resolveApiKeyForProvider } from "../agents/model-auth.js";
+import { isTruthyEnvValue } from "../infra/env.js";
 import { createSubsystemLogger } from "../logging.js";
 import type { EmbeddingProvider, EmbeddingProviderOptions } from "./embeddings.js";
 
@@ -11,7 +12,7 @@ export type GeminiEmbeddingClient = {
 
 const DEFAULT_GEMINI_BASE_URL = "https://generativelanguage.googleapis.com/v1beta";
 export const DEFAULT_GEMINI_EMBEDDING_MODEL = "gemini-embedding-001";
-const debugEmbeddings = process.env.CLAWDBOT_DEBUG_MEMORY_EMBEDDINGS === "1";
+const debugEmbeddings = isTruthyEnvValue(process.env.CLAWDBOT_DEBUG_MEMORY_EMBEDDINGS);
 const log = createSubsystemLogger("memory/embeddings");
 
 const debugLog = (message: string, meta?: Record<string, unknown>) => {