Refactor Policy Enforcer to Policy Checker

- Renamed the `PolicyEnforcer` interface and related implementations to `PolicyChecker` for clarity and consistency.
- Updated configuration keys in YAML files to reflect the new `checkPolicy` terminology.
- Adjusted related code, tests, and documentation to support the new naming convention and ensure compatibility.
- Enhanced comments and examples for the `checkPolicy` configuration to improve usability.

pkg/plugin/definition/policyChecker.go

@@ -0,0 +1,17 @@
+package definition
+
+import (
+	"context"
+
+	"github.com/beckn-one/beckn-onix/pkg/model"
+)
+
+// PolicyChecker interface for policy checking on incoming messages.
+type PolicyChecker interface {
+	CheckPolicy(ctx *model.StepContext) error
+}
+
+// PolicyCheckerProvider interface for creating policy checkers.
+type PolicyCheckerProvider interface {
+	New(ctx context.Context, config map[string]string) (PolicyChecker, func(), error)
+}

pkg/plugin/definition/policyEnforcer.go

@@ -1,17 +0,0 @@
-package definition
-
-import (
-	"context"
-
-	"github.com/beckn-one/beckn-onix/pkg/model"
-)
-
-// PolicyEnforcer interface for policy enforcement on incoming messages.
-type PolicyEnforcer interface {
-	Run(ctx *model.StepContext) error
-}
-
-// PolicyEnforcerProvider interface for creating policy enforcers.
-type PolicyEnforcerProvider interface {
-	New(ctx context.Context, config map[string]string) (PolicyEnforcer, func(), error)
-}