Add configurable logger with PAYLOAD_MAILING_LOG_LEVEL support

- Created centralized logger utility using Payload's built-in logger system
- Added PAYLOAD_MAILING_LOG_LEVEL environment variable for log level configuration
- Replaced all console.log/error/warn calls with structured logger
- Added debug logging for immediate processing flow to help troubleshoot issues
- Improved logging context with specific prefixes (IMMEDIATE, PROCESSOR, JOB_SCHEDULER, etc.)
- Bumped version to 0.4.10

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/utils/emailProcessor.ts

@@ -1,4 +1,5 @@
 import type { Payload } from 'payload'
+import { createContextLogger } from './logger.js'
 
 /**
  * Processes a single email by ID using the mailing service
@@ -36,20 +37,28 @@ export async function processEmailById(payload: Payload, emailId: string): Promi
  * @returns Promise that resolves when job is processed
  */
 export async function processJobById(payload: Payload, jobId: string): Promise<void> {
+  const logger = createContextLogger(payload, 'PROCESSOR')
+  logger.debug(`Starting processJobById for job ${jobId}`)
+
   if (!payload.jobs) {
     throw new Error('PayloadCMS jobs not configured - cannot process job immediately')
   }
 
   try {
+    logger.debug(`Running job ${jobId} with payload.jobs.run()`)
+
     // Run a specific job by its ID (using where clause to find the job)
-    await payload.jobs.run({
+    const result = await payload.jobs.run({
       where: {
         id: {
           equals: jobId
         }
       }
     })
+
+    logger.info(`Job ${jobId} execution completed`, { result })
   } catch (error) {
+    logger.error(`Job ${jobId} execution failed:`, error)
     throw new Error(`Failed to process job ${jobId}: ${String(error)}`)
   }
 }