OTEL Collection & Throttler Config

This release improves sandbox observability with a new OpenTelemetry collection pipeline. Sandboxes can now send telemetry data to a configurable OTEL endpoint, processed through a custom collector backed by ClickHouse. The dashboard includes an experimental page for viewing and querying collected sandbox metrics.

Rate limiting gains per-organization flexibility with adjustable throttler TTL settings. Organizations can now configure separate block durations for authenticated requests, sandbox creation, and lifecycle operations, replacing the previous one-size-fits-all approach.

The dashboard simplifies tier progression by removing the GitHub account linking requirement for Tier 2 and the business email verification for Tier 3. Additional updates include a Grafana Cloud dashboard example and dependency bumps across multiple packages.