feat: modernize otel

[franklinkim]

Description

Modernize OpenTelemetry integration by adopting semconv attributes for logs, traces, and metrics. Bump OTel and semconv dependencies, use upstream semconv conventions where available, and consolidate keel-specific attributes in semconv/ package.

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 💥 Breaking change
• 📝 Documentation
• ♻️ Refactoring
• 🏃‍➡️ Performance
• ✅ Tests
• 🔐 Security
• 🔧 Build/CI

Changes

• Bump go.opentelemetry.io/otel to v1.43.0, update all semconv versions
• Replace legacy log fields with go.opentelemetry.io/otel/semconv attributes in log.With* functions
• Add new semconv packages: generic.go (name, value, duration, trace/span IDs), circuitbreaker.go, rbac.go
• Migrate log field setters to use WithAttributes and OTel attributes
• Update HTTP middleware and roundtripware to use semconv attributes
• Fix deprecation warnings and update GitHub Actions cache key
• Add integration tests for NATS connect logging
• Apply semconv to job, closer, temporal metrics, and stream implementations

Checklist

• My code adheres to the coding and style guidelines of the project.
• I have performed a self-review of my own code.
• I have commented on my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.

[danielthomas74]

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