fill()

This release introduces new PromQL functions like `start_timestamp`, enhances service discovery with OCI support, and includes numerous performance improvements and bug fixes across TSDB, scraping, and remote write functionalities. It also deprecates certain `stats` query parameter values for future removal.

This release introduces a secure distroless Docker image variant, adds new PromQL fill modifiers, and provides an OpenAPI 3.2 specification for the API. Numerous performance improvements and bug fixes address issues across PromQL, TSDB, and OTLP handling.

This release introduces a secure distroless Docker image variant and significant PromQL enhancements, including new `fill()` modifiers and performance improvements across the query engine and TSDB. Several bugs related to OTLP handling, PromQL functions, and memory leaks have also been resolved.