refactor: change pointer receivers to value types for Conversation and UserMessage in various structs and functions

internal/ai/runtime/executor/context_builders.go

@@ -13,9 +13,6 @@ import (
 )
 
 func buildRunMessages(ctx context.Context, req RunInput, summary *RunResult, collector *callbacks.RuntimeTraceCollector) []*schema.Message {
-	if req.Conversation == nil || req.UserMessage == nil {
-		return nil
-	}
 	history := adapter.BuildHistoryMessages(req.Conversation.ID, req.UserMessage.ID, 12)
 	if summary != nil {
 		summary.HistoryMessageCount = len(history.Messages)
@@ -39,7 +36,7 @@ func buildRunMessages(ctx context.Context, req RunInput, summary *RunResult, col
 }
 
 func appendRetrievedContext(ctx context.Context, req RunInput, summary *RunResult, collector *callbacks.RuntimeTraceCollector, messages *[]*schema.Message) knowledgeGuardDecision {
-	if req.UserMessage == nil || messages == nil {
+	if messages == nil {
 		return knowledgeGuardDecision{}
 	}
 	retriever := retrievers.NewKnowledgeRetriever(req.AIAgent)

internal/ai/runtime/executor/service.go

@@ -33,16 +33,6 @@ func (s *Service) ExecuteRun(ctx context.Context, req RunInput) (*RunResult, err
 	}
 	collector := callbacks.NewRuntimeTraceCollector()
 	collector.Data.RunID = summary.RunID
-	if req.Conversation == nil || req.UserMessage == nil {
-		summary.Status = "error"
-		summary.ErrorMessage = "invalid runtime request"
-		collector.Data.Status = summary.Status
-		collector.Data.Error.Message = summary.ErrorMessage
-		collector.Data.Error.Stage = "prepare"
-		summary.TraceData = collector.Marshal()
-		return summary, fmt.Errorf("%s", summary.ErrorMessage)
-	}
-
 	toolDefs, err := factory.NewToolFactory().BuildMCPTools(req.AIAgent)
 	if err != nil {
 		summary.Status = "error"

internal/ai/runtime/executor/types.go

@@ -6,8 +6,8 @@ import (
 )
 
 type RunInput struct {
-	Conversation     *models.Conversation
-	UserMessage      *models.Message
+	Conversation     models.Conversation
+	UserMessage      models.Message
 	AIAgent          models.AIAgent
 	AIConfig         models.AIConfig
 	SelectedSkill    *models.SkillDefinition
@@ -18,7 +18,7 @@ type RunInput struct {
 }
 
 type ResumeInput struct {
-	Conversation *models.Conversation
+	Conversation models.Conversation
 	AIAgent      models.AIAgent
 	AIConfig     models.AIConfig
 	CheckPointID string