Refactor silent debugging to happy path error handling

- Replaced instances of silentDebug with happy_path_error__with_fallback across multiple files to improve error logging and handling.
- Updated the utility function to provide clearer semantics for error handling when expected values are missing.
- Introduced a script to find potential silent failures in the codebase that may need to be addressed with the new error handling approach.

src/hooks/new-hook.ts

@@ -37,7 +37,7 @@ import path from 'path';
 import { stdin } from 'process';
 import { createHookResponse } from './hook-response.js';
 import { ensureWorkerRunning, getWorkerPort } from '../shared/worker-utils.js';
-import { silentDebug } from '../utils/silent-debug.js';
+import { happy_path_error__with_fallback } from '../utils/silent-debug.js';
 
 export interface UserPromptSubmitInput {
   session_id: string;
@@ -61,7 +61,7 @@ async function newHook(input?: UserPromptSubmitInput): Promise<void> {
   const { session_id, cwd, prompt } = input;
 
   // Debug: Log what we received
-  silentDebug('[new-hook] Input received', {
+  happy_path_error__with_fallback('[new-hook] Input received', {
     session_id,
     cwd,
     cwd_type: typeof cwd,
@@ -72,7 +72,7 @@ async function newHook(input?: UserPromptSubmitInput): Promise<void> {
 
   const project = path.basename(cwd);
 
-  silentDebug('[new-hook] Project extracted', {
+  happy_path_error__with_fallback('[new-hook] Project extracted', {
     project,
     project_type: typeof project,
     project_length: project?.length,