Release 1.57.0

Metrics

• Add in-development Bind API to synchronous instruments.
  (#5050)
• Clarify that View-provided metric stream name is not subject to instrument
  name syntax validation.
  (#5094)

Common

• Define the Core packages term.
  (#5046)
• Rework contributing guide to reflect current process.
  (#5072)

Compatibility

• Stabilize sections of Prometheus and OpenMetrics Compatibility.
  • Stabilize translation of labels prefixed with otel_scope_ to OTLP Instrumentation Scope.
    (#5004)
  • Stabilize OpenTelemetry Gauge and Sum to Prometheus transformations.
    (#5034)
  • Stabilize OpenTelemetry Instrumentation Scope to Prometheus labels transformation.
    (#5052)
• Stabilize sections of Prometheus Metrics Exporter.
  • Stabilize temporality.
    (#5024)
  • Stabilize version and format.
    (#5083)
  • Stabilize port configuration.
    (#5026)
  • Stabilize scope_info_enabled configuration.
    (#5056)
• Change Prometheus Metric Exporter config property recommended names
  (without_scope_info -> scope_info_enabled, without_target_info -> target_info_enabled,
  with_resource_constant_labels -> resource_constant_labels)
  (#5071)
• Clarify that OTel SDKs should not use unofficial Prometheus clients.
  (#5082)

OTEPs

• Add OTEP for Semantic Convention Schema v2 with support for multiple convention
  registries and resolved schema format
  (#4815)