Implement AuditScope extension for Scope

[s-vitaliy]

Part of #71
Also related to #70

Scope

Implemented:

• Implemented AuditScope - an extension method that allows define an initial audit scope for the token endpoint.
• Added integration tests for the audit middlewares.

Additional changes:

• Moved extract_external_token to one level up.
• Updated docstring in the project

Checklist

• GitHub issue exists for this change.
• Unit tests added and they pass.
• Line Coverage is at least 80%.
• Review requested on latest commit.

[github-actions]

Coverage after merging add-audited-pipeline into main will be

81.15%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src/contracts/internal_token/v1
boxer_claims.rs	100%	100%	100%	100%
token.rs	100%	100%	100%	100%
src/contracts/internal_token/v1/boxer_claims
tests.rs	100%	100%	100%	100%
src/contracts/internal_token/v1/token
tests.rs	100%	100%	100%	100%
src/contracts/internal_token/v2
boxer_claims.rs	100%	100%	100%	100%
internal_token.rs	0%	100%	0%	0%	31–54, 60–69, 71–72, 74–77
src/contracts/internal_token/v2/boxer_claims
tests.rs	98.92%	100%	100%	98.75%	53
src/contracts/internal_token/v2/internal_token
tests.rs	100%	100%	100%	100%
src/http
readiness.rs	96.55%	100%	100%	95.83%	42
src/http/extractors
boxer_claims.rs	0%	100%	0%	0%	10–13, 15–17
src/http/middleware
extract_external_token.rs	100%	100%	100%	100%
tracer.rs	0%	100%	0%	0%	30–37
src/http/middleware/audit
audit_recorder.rs	96.55%	100%	100%	96.15%
audit_scope.rs	100%	100%	100%	100%
audited_error.rs	80%	100%	66.67%	81.25%	117, 123–124, 133–135, 140–142, 80, 89–90
audited_request.rs	69.23%	100%	66.67%	69.57%	121, 129, 48–51, 53, 64–70
audited_response.rs	86.36%	100%	100%	84.21%	32–34
begin_audit_chain.rs	100%	100%	100%	100%
tests.rs	63.89%	100%	50%	69.23%	120, 164, 178, 20, 70
src/http/middleware/audit/audit_recorder
audit_recorder_factory.rs	100%	100%	100%	100%
tests.rs	72.31%	100%	60%	77.78%	121, 143, 151, 71, 96
src/http/middleware/audit/audited_error
tests.rs	100%	100%	100%	100%
src/http/middleware/audit/audited_request
tests.rs	100%	100%	100%	100%
src/http/middleware/audit/begin_audit_chain
tests.rs	80%	100%	80%	80%	38
src/http/middleware/tracer
tracer_middleware_factory.rs	0%	100%	0%	0%	15–17, 32–41
src/models
external_token.rs	96.30%	100%	100%	95.65%	47
src/models/external_token
tests.rs	100%	100%	100%	100%
src/services/audit
audit_facade.rs	100%	100%	100%	100%
log_audit_service.rs	0%	100%	0%	0%	13–15
src/services/audit/audit_facade
tests.rs	98.48%	100%	95.45%	99.09%
to_audit_record.rs	50%	100%	50%	50%	6–8
src/services/audit/chained
audit_event.rs	100%	100%	100%	100%
chained_audit_event.rs	100%	100%	100%	100%
token_audit_event.rs	68.18%	100%	66.67%	68.42%	37–42
src/services/audit/events
authorization_audit_event.rs	0%	100%	0%	0%	21, 23–24, 26, 30–38, 40–42
resource_delete_audit_event.rs	100%	100%	100%	100%
resource_modification_audit_event.rs	100%	100%	100%	100%
token_validation_event.rs	0%	100%	0%	0%	23–32, 34–36, 38–42, 44, 46–54, 64–66, 68, 70
src/services/backends
memory.rs	0%	100%	0%	0%	19–23, 25, 36–40, 42–45, 56–60
src/services/backends/kubernetes
kubeconfig_loader.rs	0%	100%	0%	0%	10–12, 14–16, 18–20, 38–42, 44, 46–51, 60–66, 72–76
kubernetes_repository.rs	59%	100%	44.44%	60.44%	118, 123, 125–127, 129, 131–132, 161, 166, 169, 174, 180, 182–183, 187, 43–49, 51–53, 55–57, 61–65
kubernetes_resource_manager.rs	90.65%	100%	84.62%	91.49%	175–176, 187–191
logging_update_handler.rs	85.71%	100%	100%	84.62%	24–25
src/services/backends/kubernetes/kubernetes_repository
schema_repository.rs	62.86%	100%	28.57%	71.43%	54–57
tests.rs	100%	100%	100%	100%
to_resource.rs	100%	100%	100%	100%
try_into_object_ref.rs	62.50%	100%	50%	64.29%	39–43
src/services/backends/kubernetes/kubernetes_repository/schema_repository
schema_document.rs	93.75%	100%	85.71%	96%
test_reduced_schema.rs	100%	100%	100%	100%
test_schema.rs	100%	100%	100%	100%
tests.rs	100%	100%	100%	100%
src/services/backends/kubernetes/kubernetes_resource_manager
object_owner_mark.rs	100%	100%	100%	100%
status.rs	44.44%	100%	50%	43.48%	27, 33–36, 38, 42–44, 52, 54–56
tests.rs	100%	100%	100%	100%
src/services/backends/kubernetes/kubernetes_resource_manager/object_owner_mark
tests.rs	100%	100%	100%	100%
src/services/backends/kubernetes/kubernetes_resource_manager/status
not_found_details.rs	100%	100%	100%	100%
owner_conflict_details.rs	100%	100%	100%	100%
src/services/observability
composed_logger.rs	68.63%	100%	75%	67.44%	30–31, 33–35, 37–40, 65–69
src/services/observability/composed_logger
tests.rs	97.47%	100%	90%	98.55%	36
src/services/observability/open_telemetry/metrics
into_metric_tag.rs	0%	100%	0%	0%	10, 8–9