[Feature] Enable additional metrics endpoints

[stevensJourney]

Overview

We currently have the functionality to capture various metrics throughout the service. These metrics are anonymously pushed to our OLTP service if configured.

This PR allows users to specify additional OLTP endpoints for metrics to be exported to.

Additional endpoints can be specified in the config YAML file, e.g.:

telemetry:
  # Opt out of reporting anonymized usage metrics to PowerSync telemetry service
  disable_telemetry_sharing: true
  additional_endpoints:
    - url: http://localhost:4318/v1/metrics
    # Optionally configure the export interval - defaults to 5 minutes
      export_interval_ms: 10000 # 10 seconds

[changeset-bot]

🦋 Changeset detected

Latest commit: c6142ac

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@powersync/service-core	Minor
@powersync/service-types	Minor
@powersync/service-image	Minor
@powersync/service-jpgwire	Patch

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[stevensJourney]

Closing this for later