feat(salesforce): Contact trigger to auto-create IT Request Case when Needs_Support__c becomes true

[devin-ai-integration]

What does this PR do?

Adds Salesforce automation that creates an "IT Request" Case when a Contact's Needs_Support__c checkbox field changes from false to true. The implementation includes:

• Custom checkbox field Needs_Support__c on Contact object
• Apex trigger that fires only when the flag changes from false to true (prevents duplicate Case creation)
• Auto-created Cases have Subject "Support Needed for {Contact.Name}" and "IT Request" record type (if available)
• Permission Set to grant field-level access to the custom field
• Comprehensive test coverage with bulk update scenarios

Acceptance Criteria

• ✅ Trigger only fires when Needs_Support__c changes to true (not on other Contact updates)
• ✅ Creates Case with correct Subject format and links to Contact
• ✅ Assigns "IT Request" record type if available in the org
• ✅ Prevents duplicate Case creation on repeated Contact edits
• ✅ Handles bulk Contact updates correctly
• ✅ 100% test coverage with passing unit tests

Testing Notes

Automated Testing:

• ContactSupportTriggerTest.createsCaseWhenFlagFlipsTrue(): Verifies single Case creation and duplicate prevention
• ContactSupportTriggerTest.bulkUpdateCreatesCasesOnceEach(): Validates bulk processing (5 Contacts → 5 Cases)

Manual CLI Verification:

• Deployed to alex@cognition.sandbox org successfully
• Seeded Contact and flipped flag to true → Created exactly 1 Case with correct Subject and Contact linkage
• Subsequent Contact update (without flag change) → No additional Cases created

Important Notes:

• RecordType "IT Request" is queried dynamically; if not found, Cases are created without specific record type
• Permission Set Contact_Needs_Support grants field access but needs assignment to appropriate users in production orgs

Checklist

• This change has been approved by the CLI Review Board or approval isn't required
• Does this follow the deprecation policy?

What issues does this PR fix or reference?

Implements Contact-triggered Case creation automation as requested in Devin session: https://app.devin.ai/sessions/d96eedaca0804048a71aa1af98ccc6c7

Requested by: Alex Peng (@alexpeng-cognition)

Review Focus Areas

• RecordType handling: Verify "IT Request" exists in target orgs or confirm graceful fallback is acceptable
• Permission assignment: Ensure Contact_Needs_Support permission set deployment strategy for production
• Trigger logic: Confirm duplicate prevention works correctly with the false → true condition
• Subject template: Validate "Support Needed for {Contact.Name}" matches exact requirements