add Prometheus query client, move Loki client, expose base obs URLs

[skudasov]

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Below is a summarization created by an LLM (gpt-4-0125-preview). Be mindful of hallucinations and verify accuracy.

Why

The changes introduce and enhance observability functionalities within the framework by adding support for querying Loki and Prometheus directly through newly created clients. The Loki client facilitates querying logs, while the Prometheus client enables querying metrics, including support for range queries. Additionally, exposing base URLs as constants simplifies configuration and usage across the framework. These enhancements aim to provide better insights into the system's behavior and performance by leveraging the capabilities of Loki and Prometheus for monitoring and debugging purposes.

What

• framework/.changeset/v0.10.8.md

  • New file outlining the changes in version 0.10.8, including moving Loki client to framework, adding Prometheus Query/QueryRange client, and exposing base obs URLs as constants.

• framework/loki/loki.go

  • New file introducing the Loki client with functionalities to query logs, handle API errors, and support basic authentication. It includes methods for initializing the client, querying Loki with specific parameters, and processing responses to extract log entries.

• framework/loki/loki_test.go

  • New file providing tests for the Loki client, ensuring it handles successful queries, authentication failures, server errors, and debug mode activation correctly.

• framework/observability.go

  • Added constants LocalGrafanaBaseURL, LocalLokiBaseURL, and LocalPrometheusBaseURL to expose the base URLs for Grafana, Loki, and Prometheus, facilitating easier access and configuration within the framework.

• framework/prometheus/prometheus.go

  • New file introducing the Prometheus client for querying metrics, including instant and range queries. It supports initializing the client, executing queries with specific parameters, and processing responses into structured data.

• framework/prometheus/prometheus_test.go

  • New file providing tests for the Prometheus client, validating its ability to handle various types of queries, including error scenarios and network issues, effectively.