refactor: implement comprehensive logging standards (#536)

[Muyideen-js]

Closes rinafcode/teachLink_backend#536

Overview

This PR implements comprehensive, standardized, and secure logging across the application, addressing all criteria outlined in issue 536

Changes Made

• Structured Logging (Pino): Standardized all logs as machine-indexable JSON records with distinct log levels (debug, info, warn, error).
• Correlation ID Auto-Propagation: Integrated Node's native AsyncLocalStorage (runWithLogContext) to automatically pass and correlate requestId and correlationId across asynchronous chains. Fallback IDs are automatically generated if context is missing.
• Sensitive Data Redaction (PII/Secrets): Engineered a robust dual redaction system:
  • Configured built-in Pino redaction settings for standard output streams.
  • Implemented a recursive deep-redaction utility that replaces sensitive values matching keys like password, secret, token, key, authorization, email, phone, ssn, auth, bearer with [REDACTED] before writing to any custom transports (like Http or In-Memory stores).
  • Standardized automated Bearer token regex-based redaction in log messages.
• Middleware integration: Wrapped request executions in runWithLogContext within withRequestLogging to correlate all request-lifecycle operations automatically.
• Standards Documentation: Created a detailed logging guide in src/lib/logging/README.md covering standards, log levels, configurations, and best practices.

Verification

• Added 3 new unit tests to logger.test.ts covering redaction, AsyncLocalStorage context propagation, and fallback ID generation.
• All 5 logging service tests and all 6 wallet connection unit tests pass successfully.

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Issue	Title
#503	refactor Wallet Connection : Bug Fix (Issue 105)	Link to this issue

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[RUKAYAT-CODER]

Kindly resolve conflict and fix workflow.