Extract Common Logging Configuration to Shared Package

[yehuditkerido]

Context

PR #2353 extracted BBR command-line arguments to structured Options following the EPP pattern. Logging configuration code is now duplicated between EPP and BBR.

Task

Extract common logging configuration from EPP and BBR into a shared package to avoid duplication and promote reusability across components.

Scope

• Identify duplicated logging code in pkg/epp/server/options.go and pkg/bbr/server/options.go
• Create shared logging options package at /pkg/common/observability/logging/options.go
• Refactor EPP and BBR to use the shared implementation
• Maintain backward compatibility with existing CLI flags

Benefits

• Single source of truth for logging configuration
• Consistent logging behavior across components
• Easier maintenance and future reusability

[yehuditkerido]

/assign