feat(logging): add structured Winston logging, global request middlew…

[Cedarich]

🚀 PR: Add structured logging and observability (Winston + external streaming)

📄 Description

• 📝 Introduces a Winston-based LoggerService with JSON output and optional external streaming (Loki/Datadog/generic HTTP).
• 🌐 Adds a global RequestLoggerMiddleware capturing method, URL, status code, and duration with log levels (info/warn/error).
• ⚡ Wires the custom logger in bootstrap to log startup events.
• ⚙️ Extends configuration and env validation to include logging settings.
• 📦 Adds axios and winston dependencies, updates .env.example with logging variables.

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✅ Acceptance Criteria

• 🛡️ Errors and requests are logged consistently with structure and levels.
• 📊 Logs can be streamed to an external dashboard via LOG_EXTERNAL_* variables.

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🧪 Verification Steps

1. Set LOG_LEVEL and (optionally) enable LOG_EXTERNAL_* variables.
2. Run:

   npm install
   npm run start:dev

[BigBen-7]

please @Cedarich resolve conflicts

[Cedarich]

Conflicts resolved.
Thanks