Integrate BACKBEAT SDK and resolve KACHING license validation

Major integrations and fixes:
- Added BACKBEAT SDK integration for P2P operation timing
- Implemented beat-aware status tracking for distributed operations
- Added Docker secrets support for secure license management
- Resolved KACHING license validation via HTTPS/TLS
- Updated docker-compose configuration for clean stack deployment
- Disabled rollback policies to prevent deployment failures
- Added license credential storage (CHORUS-DEV-MULTI-001)

Technical improvements:
- BACKBEAT P2P operation tracking with phase management
- Enhanced configuration system with file-based secrets
- Improved error handling for license validation
- Clean separation of KACHING and CHORUS deployment stacks

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/sashabaranov/go-openai/reasoning_validator.go

@@ -0,0 +1,82 @@
+package openai
+
+import (
+	"errors"
+	"strings"
+)
+
+var (
+	// Deprecated: use ErrReasoningModelMaxTokensDeprecated instead.
+	ErrO1MaxTokensDeprecated                   = errors.New("this model is not supported MaxTokens, please use MaxCompletionTokens")                               //nolint:lll
+	ErrCompletionUnsupportedModel              = errors.New("this model is not supported with this method, please use CreateChatCompletion client method instead") //nolint:lll
+	ErrCompletionStreamNotSupported            = errors.New("streaming is not supported with this method, please use CreateCompletionStream")                      //nolint:lll
+	ErrCompletionRequestPromptTypeNotSupported = errors.New("the type of CompletionRequest.Prompt only supports string and []string")                              //nolint:lll
+)
+
+var (
+	ErrO1BetaLimitationsMessageTypes = errors.New("this model has beta-limitations, user and assistant messages only, system messages are not supported")       //nolint:lll
+	ErrO1BetaLimitationsTools        = errors.New("this model has beta-limitations, tools, function calling, and response format parameters are not supported") //nolint:lll
+	// Deprecated: use ErrReasoningModelLimitations* instead.
+	ErrO1BetaLimitationsLogprobs = errors.New("this model has beta-limitations, logprobs not supported")                                                                               //nolint:lll
+	ErrO1BetaLimitationsOther    = errors.New("this model has beta-limitations, temperature, top_p and n are fixed at 1, while presence_penalty and frequency_penalty are fixed at 0") //nolint:lll
+)
+
+var (
+	//nolint:lll
+	ErrReasoningModelMaxTokensDeprecated = errors.New("this model is not supported MaxTokens, please use MaxCompletionTokens")
+	ErrReasoningModelLimitationsLogprobs = errors.New("this model has beta-limitations, logprobs not supported")                                                                               //nolint:lll
+	ErrReasoningModelLimitationsOther    = errors.New("this model has beta-limitations, temperature, top_p and n are fixed at 1, while presence_penalty and frequency_penalty are fixed at 0") //nolint:lll
+)
+
+// ReasoningValidator handles validation for reasoning model requests.
+type ReasoningValidator struct{}
+
+// NewReasoningValidator creates a new validator for reasoning models.
+func NewReasoningValidator() *ReasoningValidator {
+	return &ReasoningValidator{}
+}
+
+// Validate performs all validation checks for reasoning models.
+func (v *ReasoningValidator) Validate(request ChatCompletionRequest) error {
+	o1Series := strings.HasPrefix(request.Model, "o1")
+	o3Series := strings.HasPrefix(request.Model, "o3")
+	o4Series := strings.HasPrefix(request.Model, "o4")
+	gpt5Series := strings.HasPrefix(request.Model, "gpt-5")
+
+	if !o1Series && !o3Series && !o4Series && !gpt5Series {
+		return nil
+	}
+
+	if err := v.validateReasoningModelParams(request); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// validateReasoningModelParams checks reasoning model parameters.
+func (v *ReasoningValidator) validateReasoningModelParams(request ChatCompletionRequest) error {
+	if request.MaxTokens > 0 {
+		return ErrReasoningModelMaxTokensDeprecated
+	}
+	if request.LogProbs {
+		return ErrReasoningModelLimitationsLogprobs
+	}
+	if request.Temperature > 0 && request.Temperature != 1 {
+		return ErrReasoningModelLimitationsOther
+	}
+	if request.TopP > 0 && request.TopP != 1 {
+		return ErrReasoningModelLimitationsOther
+	}
+	if request.N > 0 && request.N != 1 {
+		return ErrReasoningModelLimitationsOther
+	}
+	if request.PresencePenalty > 0 {
+		return ErrReasoningModelLimitationsOther
+	}
+	if request.FrequencyPenalty > 0 {
+		return ErrReasoningModelLimitationsOther
+	}
+
+	return nil
+}