Add type-safe artifact lane resolution

internal/framework/contracts/contracts.go

@@ -228,7 +228,7 @@ type ExtractionResult struct {
 	Warnings []Warning     `json:"warnings,omitempty"`
 }
 
-type Extractor interface {
+type LegacyRawExtractor interface {
 	Key() string
 	ReferenceSlots() []ReferenceSlot
 	Extract(ctx context.Context, req ExtractionRequest) (ExtractionResult, error)
@@ -279,7 +279,7 @@ type ValidationResult struct {
 	Warnings               []Warning `json:"warnings,omitempty"`
 }
 
-type Validator interface {
+type LegacyRawValidator interface {
 	Name() string
 	ExecutionClass() ExecutionClass
 	Validate(ctx context.Context, req ValidationRequest) (ValidationResult, error)
@@ -328,7 +328,7 @@ type MergeOutput struct {
 	Payload   RawPayload     `json:"payload"`
 }
 
-type Merger interface {
+type LegacyRawMerger interface {
 	Key() string
 	Merge(ctx context.Context, req MergeRequest) (MergeResult, error)
 }
@@ -359,7 +359,7 @@ type NormalizeOutput struct {
 	Payload       RawPayload     `json:"payload"`
 }
 
-type Normalizer interface {
+type LegacyRawNormalizer interface {
 	Key() string
 	ReferenceSlots() []ReferenceSlot
 	Normalize(ctx context.Context, req NormalizeRequest) (NormalizeResult, error)