feat: API monitoring

[wylited]

How this monitoring system will work is that each API service will expose a fastify-metrics endpoint at /metrics.
this is a Prometheus scrapable endpoint for our monitoring platform.

Furthermore, if provided, it will fastify will log automatically to a Loki logging server using pino-loki.

The rest of the setup for monitoring will be done on the server.

[Copilot]

Pull request overview

This PR adds comprehensive API monitoring capabilities to the Fastify-based template service by integrating Prometheus metrics collection and optional Loki logging.

Key Changes:

• Adds fastify-metrics plugin to expose a /metrics endpoint for Prometheus scraping with default metrics enabled
• Integrates pino-loki transport for optional centralized logging to a Loki server
• Introduces optional LOKI_HOST environment variable for conditional logging configuration

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 5 comments.

File	Description
yarn.lock	Adds dependency resolutions for fastify-metrics (v12.1.0), pino-loki (v3.0.0), prom-client (v15.1.3), and their transitive dependencies
package.json	Adds fastify-metrics and pino-loki as runtime dependencies
src/app.ts	Configures metrics endpoint registration and conditional Loki logging transport based on LOKI_HOST environment variable
.env.example	Documents the optional LOKI_HOST environment variable with example configuration

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 8 comments.

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 6 changed files in this pull request and generated 10 comments.

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[FlandiaYingman]

Fix the linter errors and this can be merged!

[wylited]

Switched to a draft momentarily until I can do more testing.

[FlandiaYingman]

Let me know if you need any help