Custom email and Order management updates - ACCS

[jhadobe]

Purpose of this pull request

This pull request documents new SaaS-only REST APIs for Adobe Commerce as a Cloud Service: custom email template management, order chain management, and programmatic order editing.

Affected pages

• https://developer.adobe.com/commerce/webapi/rest/saas-integrations/order-management (new)
• https://developer.adobe.com/commerce/webapi/rest/saas-integrations/custom-email

What's New highlights

whatsnew
Added Order management API covering the new order chain endpoints and programmatic order editing.
Documented the new custom email template endpoints on Email triggering through the REST API.

[github-actions]

🔍 Linter Report

Click to expand full report

═══════════════════════════════════════════════════════════════
                     LINTER REPORT
═══════════════════════════════════════════════════════════════

Generated: 2026-07-27T20:12:29.233Z
Mode: Full Linting (all rules + dead links check)
Target Directory: /home/runner/work/commerce-webapi/commerce-webapi
Skipped Rules:
  - check-frontmatter → src/pages/includes
  - missing-heading → src/pages/includes

───────────────────────────────────────────────────────────────

Files to process: 4

───────────────────────────────────────────────────────────────
📄 FILE: src/pages/config.md
───────────────────────────────────────────────────────────────
  ⚠️  WARNING
    Location: Line 1:1
    Message: Missing frontmatter section - add --- at the beginning with title and description
    Rule: check-frontmatter


═══════════════════════════════════════════════════════════════
                        SUMMARY
═══════════════════════════════════════════════════════════════

  📁 Files processed:    4
  📄 Files with issues:  1
  ❌ Total errors:       0
  ⚠️  Total warnings:     1
  📋 Total issues:       1

Result: ⚠️  PASSED WITH WARNINGS - No fatal errors

═══════════════════════════════════════════════════════════════

---

This comment was automatically generated by the linter bot.

[github-actions]

🔍 Linter Report

Click to expand full report

═══════════════════════════════════════════════════════════════
                     LINTER REPORT
═══════════════════════════════════════════════════════════════

Generated: 2026-07-28T19:20:12.275Z
Mode: Full Linting (all rules + dead links check)
Target Directory: /home/runner/work/commerce-webapi/commerce-webapi
Skipped Rules:
  - check-frontmatter → src/pages/includes
  - missing-heading → src/pages/includes

───────────────────────────────────────────────────────────────

Files to process: 4

───────────────────────────────────────────────────────────────
📄 FILE: src/pages/config.md
───────────────────────────────────────────────────────────────
  ⚠️  WARNING
    Location: Line 1:1
    Message: Missing frontmatter section - add --- at the beginning with title and description
    Rule: check-frontmatter


═══════════════════════════════════════════════════════════════
                        SUMMARY
═══════════════════════════════════════════════════════════════

  📁 Files processed:    4
  📄 Files with issues:  1
  ❌ Total errors:       0
  ⚠️  Total warnings:     1
  📋 Total issues:       1

Result: ⚠️  PASSED WITH WARNINGS - No fatal errors

═══════════════════════════════════════════════════════════════

---

This comment was automatically generated by the linter bot.