[minor][engg]: Mirror automation health checks in PR validation pipeline

[Copilot]

This aligns this repo’s PR validation pipeline with the common-library change by enabling the same automation health tracker gate. The health check now evaluates the same pipeline IDs (1956, 1284) during PR validation.

• Automation health tracker integration

  • Added external pipeline template source under resources.repositories:
    • IDDP/MSAL-ObjC-Pipelines (alias: automationHealthTracker)
  • Added a new AutomationHealth job at the top of jobs so health status is evaluated as part of PR checks.

• Pipeline ID configuration

  • Set automationPipelineIds to the requested IDs: [1956, 1284].

resources:
  repositories:
    - repository: automationHealthTracker
      type: git
      name: IDDP/MSAL-ObjC-Pipelines
      ref: main

jobs:
- job: AutomationHealth
  pool: { vmImage: 'ubuntu-latest' }
  steps:
    - template: Pipeline YAMLs/automation-health-tracker.yml@automationHealthTracker
      parameters:
        automationPipelineIds: [1956, 1284]

[azure-pipelines]

This pull request does not update CHANGELOG.md.

Please consider if this change would be noticeable to a partner or user and either update CHANGELOG.md or resolve this conversation.