Add structured 'admin_action' log channel separate from request logs (v5 patch)

[greatest0fallt1me]

Description

This is a backend issue for the GrantFox campaign. Emit admin actions to a separate structured log channel so they can be alerted on without noise from request logs.

Requirements and Context

• Pino child logger for admin actions
• Distinct stream/sink configuration
• Every admin endpoint emits via this channel
• Adhere to repo's lint and code style
• Must be secure, tested, and documented

Suggested Execution

1. Fork the repo and create a branch

   git checkout -b feature/admin-log-channel

2. Implement changes
   • src/middleware/adminLog.ts (new)
   • src/routes/admin/**
3. Test and commit

Example commit message

feat: structured admin_action log channel

Acceptance Criteria

• Child logger created
• Admin endpoints emit
• Tests added
• Docs updated

Guidelines

• Minimum 90% test coverage on changed lines
• Structured logging with correlation IDs
• Clear documentation and inline comments
• Timeframe: 96 hours

[zeemscript]

Hi @maintainer! I’m interested in contributing to this task and can ensure timely delivery with clean implementation.

[Bilalishaq7]

Gooday maintainer,
I'd love to take on this issue and i'll submit a PR in few hours

[gloskull]

Hi, I’d love to work on this issue. I have 4 years of experience across backend, frontend, full-stack, and smart contract development. I understand the task clearly and can deliver a clean, efficient, well-tested solution on time, with strong focus on code quality and maintainability. My PR will be submitted in under 10 hours.