[CHORE] adding metric usage correlation

[nicolastakashi]

This pull request introduces significant changes to the prom-analytics-proxy project, focusing on adding new metrics usage endpoints, updating database schema and operations, and modifying dependencies.

New Endpoints and Routes:

• Added new endpoints for metrics usage: /api/v1/serieUsage/{name} and /api/v1/metrics in api/routes/routes.go. These endpoints handle the retrieval and pushing of metrics usage data. [1] [2]

Database Schema and Operations:

• Introduced new tables for storing rules usage in ClickHouse, PostgreSQL, and SQLite databases. This includes creating the table schemas and implementing methods to insert and retrieve rules usage data. [1] [2] [3]
• Added new methods in database providers for inserting and retrieving rules usage data, including pagination support and JSON handling for labels. [1] [2] [3]

Dependency Updates:

• Updated go.mod to include new dependencies: github.com/perses/metrics-usage and github.com/sirupsen/logrus. Also, updated the Go version to 1.23.1 and added a toolchain specification. [1] [2] [3]

Minor Code Improvements:

• Added JSON encoding/decoding capabilities in internal/db/clickhouse.go to handle rules usage data.
• Improved the initialization of slices to avoid potential issues with nil slices. [1] [2]

These changes enhance the functionality of the project by adding support for metrics usage tracking and improving database interactions.