Refactor service object variable names to camelCase

[markgoho]

Background

Currently, many service object variable names use descriptive names like memberAdminService, newsletterService, etc. We should standardize these to use consistent camelCase naming throughout the codebase.

Scope

• Backend services in /functions/src/
• Frontend services in /members/src/app/services/
• Update all variable declarations, parameters, and references

Examples

// Current
const memberAdminService = ...
const newsletterService = ...

// After refactor (if needed for consistency)
// Review actual usage and determine best naming convention

Acceptance Criteria

• All service object variables use consistent camelCase naming
• No breaking changes to service functionality
• All tests still pass
• Code follows project style guidelines

Priority

Low - This is a refactoring task for code consistency, not a functional bug.