Update UPS API timeouts and strengthen PATCH vs PUT guidance

[smrithijayarajan]

Follow-up to PR #1775 based on team feedback from Ravi and Matt.

Changes Made

✅ Timeout Updates:

• Changed from 240 minutes to 120 minutes (60 minutes in CCPS environments)
• Removed outdated future plans note

✅ Language Cleanup:

• Removed 'please reach out to us with provisionId' text per team feedback

✅ PATCH vs PUT Guidance Strengthened:

• Changed 'minimize error rates' to 'minimize data loss risk' (more accurate)
• Rewrote Operations Best Practices section with explicit guidance:
  • PUT only for initial user creation (or intentional full replacement)
  • PATCH for ALL incremental user updates
  • Warning that PUT overwrites user and removes all previous edits
  • Emphasis on data loss risk for enterprise customers

Context

These updates address feedback from internal team discussions:

• Ravi: Correct timeout values (120 min standard, 60 min CCPS)
• Matt: Strengthen PATCH guidance with data loss warnings

Files Changed

• (-8 lines, +3 lines)

cc: @sap-alex-oliveira (reviewer of original PR #1775)

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[smrithijayarajan]

Please don't merge until Ravi Laudya approves. Thank you!