fix: selectAnchorUPF() skip some links when searching

• Add BSF service client for SM context binding lifecycle:
  - Create bsf_service.go with CreatePCFBinding, DeletePCFBinding functions
  - Integrate BSF client into consumer.go for binding operations
  - Add BSF service configuration and discovery support

• Enhance SM context management:
  - Update sm_context.go with BSF binding ID tracking
  - Integrate binding creation/deletion in PDU session lifecycle
  - Add proper cleanup of BSF bindings on session termination

• Update PDU session processor:
  - Modify pdu_session.go to use BSF for binding management
  - Add BSF binding creation during session establishment
  - Ensure proper binding cleanup on session release

This integration enables SMF to properly manage bindings with BSF
according to 3GPP TS 29.521 specifications for enhanced session management.

- Add context import and convert http.NewRequest to http.NewRequestWithContext
- Fix errcheck issues by adding proper resp.Body.Close() error handling
- Resolve govet variable shadowing with renamed error variables
- Ensure all HTTP operations use proper context and error checking

Fixes: errcheck, govet, noctx linting violations
Tested: golangci-lint returns 0 issues

- Enhanced BSF service to capture and store BSFBindingID from X-BSF-Binding-ID header
- Added NotifyPCFBindingRelease function for proper BSF cleanup
- Integrated BSF notification in SMContext removal process
- Implemented complete BSF binding lifecycle management in SMF
- Addresses @Alonza0314's comment about unused BSFBindingID field

Files modified:
- internal/sbi/consumer/bsf_service.go: BSFBindingID capture and release notification
- internal/sbi/consumer/consumer.go: Added BSF release function to consumer interface
- internal/sbi/processor/sm_common.go: Integrated BSF cleanup in context removal

chore: update openapi

feat(SMF): Integrate BSF client for binding management

refactor: generate default path func

feat: xn based handover under dc condition