Add Salesforce contract tests to validate form field mappings

[pettinarip]

Adds contract tests that validate form field mappings against the Salesforce schema to prevent integration failures from schema mismatches.

Changes

• New test suite (sf-contract.test.ts) that queries Salesforce metadata API to verify:

  • All mapped fields exist in Salesforce for RFP, Direct Grant, Wishlist, and Office Hours forms
  • Picklist values match Salesforce options (Profile Type, Domain, Output, Timezone, Currency, Office Hours Request Type)
  • Hardwired fields and common fields are present

• Salesforce metadata utilities (lib/sf/metadata.ts) with caching to fetch object schemas efficiently

• Updated test configuration with extended timeout for Salesforce API calls

Benefits

• Early detection of schema mismatches before production deployment
• Prevents runtime errors from missing or renamed Salesforce fields
• Validates picklist values to ensure form options match Salesforce configuration
• Automated validation runs in CI/CD pipeline

Testing

Tests run against live Salesforce metadata API (requires SF credentials in test environment).