Rename FieldProxy to FieldValue (or Value)

[jhs]

Overview

Rename the FieldProxy class to FieldValue (or possibly just Value) across both Python and TypeScript implementations.

Rationale

Better semantic naming - this class represents the value of a field with transformation access, not a proxy pattern.

Naming Decision

• Decide between FieldValue or Value
• Consider: Value is shorter, FieldValue is more explicit

Scope

This is an isomorphic change affecting both implementations equally:

Code Changes

• Python: Rename FieldProxy class to chosen name
• TypeScript: Rename FieldProxy class to chosen name
• Update all imports and references
• Update type annotations and hints

Test Updates

• Python: Update all test files referencing FieldProxy
• TypeScript: Update all test files referencing FieldProxy

Documentation Updates

• All markdown files in Documentation/
• CLAUDE.md (root) - references FieldProxy in architecture section
• Python/CLAUDE.md
• TypeScript/CLAUDE.md
• README.md files
• Architecture documentation
• API reference documentation

Examples

• Python examples
• TypeScript examples
• Any comments explaining the class

Search Strategy

# Find all occurrences
grep -ri "fieldproxy" --include="*.py" --include="*.ts" --include="*.md" --include="*.tsx"

Implementation Notes

• This is likely a breaking change if users import the class directly
• Update version numbers appropriately
• Verify no FieldProxy references remain anywhere