feat: structured JSON logging for production log aggregation

[emarc99]

• Closes Configure structured JSON logging for production log aggregation #353

Description

This PR configures structured JSON logging for production log aggregation across both the NestJS REST API and the GraphQL gateway, replacing plain text logs with structured JSON. It also implements correlation ID tracing, request/response logging, and log redaction.

Key Changes

• Shared Logger Configuration (logger.config.ts):
  • Output structured JSON in production; pino-pretty in development.
  • Configurable log level (LOG_LEVEL) and log sampling (LOG_SAMPLE_RATE).
  • Structured fields (service: 'nftopia-backend', environment, timestamp in ISO format).
  • Redacts sensitive data (password, token, authorization, cookie, secret, key, apiKey).
  • Truncates error stack traces to 10 lines and reduces verbosity for /health and /metrics endpoints.
• Correlation ID Propagation:
  • CorrelationIdMiddleware: Extracts or generates x-correlation-id and sets it on the request and response headers.
  • CorrelationIdInterceptor: Global interceptor ensuring correlation ID propagation in both HTTP/REST and GraphQL response headers.
• Service Integrations:
  • Configured AppModule and GraphqlGatewayModule to use the shared logger and middleware.
  • Unified the GraphQL gateway to use PinoLogger instead of NestLogger.
• Fixes & Dependencies:
  • Added express as a direct dependency in package.json to resolve strict pnpm module resolution.
  • Imported AuditModule in AdminModule to fix a dependency resolution crash (UnknownDependenciesException for AuditService) introduced in the recent main branch pull.

Verification

• A. Production Mode (Structured JSON Logs)

• B. Development Mode (Pretty-Printed Logs)

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[emarc99]

@Oluwaseyi89

[Oluwaseyi89]

@emarc99 I will advice you to go open a general ticket to claim your points as points were not automatically assigned.

[emarc99]

As that seems to be the case, I will open a ticket. Thanks.