fix: Comprehensive field compatibility fixes

[maksimu]

Field Type Definition Updates:

• Update field-types.json with missing elements for complex fields
• Fix phone field: add elements [region, number, ext, type]
• Fix name field: change elements from [firstName, lastName, fullName] to [first, middle, last]
• Fix bankAccount field: add missing otherType element
• Fix privateKey field: add elements [publicKey, privateKey]
• Fix schedule field: add elements [type, time, month]
• Add missing appFiller field type with elements [applicationTitle, contentFilter, macroSequence]
• Add missing pamResources field type with elements [controllerUid, folderUid, resourceRef]
• Update complex field processing logic to handle new field definitions

Field Value Formatting Fixes:

• Add automatic field validation and formatting in processFieldsForSDK()
• Fix date fields: auto-convert Unix seconds to milliseconds
• Fix card numbers: remove dashes, spaces, and dots from card numbers
• Fix expiration dates: convert MM/YY to MM/YYYY format with smart year detection
• Provide user warnings when field values are automatically reformatted

Testing & Infrastructure:

• Add GetFieldType() helper function for testing field type definitions
• Add comprehensive field loading tests in loader_test.go
• Add field processing tests for new complex field types (appFiller, schedule)
• Add field formatting tests with 25+ test cases covering edge cases
• Add field reconstruction tests for complex field processing pipeline

Resolves issues with:

• Field type mismatches between MCP and Commander
• Date fields sending Unix timestamps in wrong format
• Card numbers being created with dashes causing display issues
• Expiration dates using MM/YY when Vault expects MM/YYYY
• Missing field type definitions causing processing failures

[miroberts]