feat(jobs): add task time warning threshold setting

Introduce a soft, log-only per-task time budget (jobs_task_max_seconds)
separate from the existing web request budget (jobs_web_max_seconds),
since PHP cannot preempt a running task mid-execution.

- Config: add taskMaxSeconds default (30s) to app/Config/Jobs.php
- Controller: validate and persist task_max_seconds in
  Jobs::postSaveSettings
- BoundedTaskRunner: accept taskMaxSeconds, measure task runtime via
  microtime, log a warning when a task exceeds the threshold
- JobRunner: read jobs_task_max_seconds from config and pass it to
  BoundedTaskRunner
- Migration: add AddJobsTaskMaxSecondsConfigKey to seed default
  app_config value
- Language: add en strings for label, validation message, and
  enabled/disabled tooltips
- View: add task_max_seconds form field to settings_config.php,
  wired to same web-mode enable/disable toggle as web_max_seconds
- Tests: update JobsControllerTest to cover new field in save/
  validation scenarios

Signed-off-by: objecttothis <17935339+objecttothis@users.noreply.github.com>

tests/Controllers/JobsControllerTest.php

@@ -61,8 +61,9 @@ class JobsControllerTest extends CIUnitTestCase
         $this->loginAsAdmin();
 
         $response = $this->post('/jobs/saveSettings', [
-            'mode'            => 'bogus',
-            'web_max_seconds' => 5,
+            'mode'             => 'bogus',
+            'web_max_seconds'  => 5,
+            'task_max_seconds' => 30,
         ]);
 
         $response->assertStatus(200);
@@ -75,8 +76,9 @@ class JobsControllerTest extends CIUnitTestCase
         $this->loginAsAdmin();
 
         $response = $this->post('/jobs/saveSettings', [
-            'mode'            => 'web',
-            'web_max_seconds' => -5,
+            'mode'             => 'web',
+            'web_max_seconds'  => -5,
+            'task_max_seconds' => 30,
         ]);
 
         $response->assertStatus(200);
@@ -89,8 +91,9 @@ class JobsControllerTest extends CIUnitTestCase
         $this->loginAsAdmin();
 
         $response = $this->post('/jobs/saveSettings', [
-            'mode'            => 'manual',
-            'web_max_seconds' => 10,
+            'mode'             => 'manual',
+            'web_max_seconds'  => 10,
+            'task_max_seconds' => 20,
         ]);
 
         $response->assertStatus(200);
@@ -99,6 +102,7 @@ class JobsControllerTest extends CIUnitTestCase
 
         $this->seeInDatabase('app_config', ['key' => 'jobs_mode', 'value' => 'manual']);
         $this->seeInDatabase('app_config', ['key' => 'jobs_web_max_seconds', 'value' => '10']);
+        $this->seeInDatabase('app_config', ['key' => 'jobs_task_max_seconds', 'value' => '20']);
     }
 
     public function testPostSaveThrottlesSavesAndDeletesMissingThrottles(): void