fix: clean up exports, add proxy set trap, update docs and test mock

- Remove unnecessary exports (coerceNumber, logLevelSchema, z from zod)
- Add set trap to serviceLocator proxy for a helpful error message
- Document resetGlobalState() removal in upgrade guide
- Fix mock logger method name (internal → logWithLevel)

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

Author: B4nan

docs/upgrading/upgrading_v4.md

@@ -184,6 +184,7 @@ The following methods and properties have been removed from `Configuration`:
 - `Configuration.getEventManager()` - moved to `ServiceLocator.getEventManager()`
 - `Configuration.useStorageClient()` - use `ServiceLocator.setStorageClient()` instead
 - `Configuration.useEventManager()` - use `ServiceLocator.setEventManager()` instead
+- `Configuration.resetGlobalState()` - use `serviceLocator.reset()` instead
 - `Configuration.storageManagers` - moved to `ServiceLocator.storageManagers`
 
 The `EventManager` and `LocalEventManager` constructors now accept an options object for configuring event intervals (e.g. `persistStateIntervalMillis`, `systemInfoIntervalMillis`). You can also use the new `LocalEventManager.fromConfig()` factory method to create an instance with intervals derived from a `Configuration` object.

packages/core/src/configuration.ts

@@ -31,13 +31,13 @@ export const coerceBoolean = z.preprocess((val) => {
     return val;
 }, z.boolean());
 
-export const coerceNumber = z.preprocess((val) => {
+const coerceNumber = z.preprocess((val) => {
     if (typeof val === 'string') return Number(val);
     return val;
 }, z.number());
 
 /** Zod schema accepting both LogLevel enum values and string names (case-insensitive). */
-export const logLevelSchema = z.preprocess((val) => {
+const logLevelSchema = z.preprocess((val) => {
     if (val == null) return val;
     const s = String(val);
     if (Number.isFinite(+s)) return +s;

packages/core/src/index.ts

@@ -17,4 +17,3 @@ export * from './cookie_utils.js';
 export * from './recoverable_state.js';
 export { PseudoUrl } from '@apify/pseudo_url';
 export { Dictionary, Awaitable, Constructor, StorageClient, Cookie, QueueOperationInfo } from '@crawlee/types';
-export { z } from 'zod';