package helps import (	"context" 	"github.com/router-for-me/CLIProxyAPI/v7/internal/logging"	"github.com/router-for-me/CLIProxyAPI/v7/internal/util"	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/executor") // EnsureSessionContext ensures that ctx carries the internal session identity// for $CPA-SESSION-ID expansion in custom headers.func EnsureSessionContext(ctx context.Context, opts cliproxyexecutor.Options, payload []byte) context.Context {	if ctx == nil {		ctx = context.Background()	}	if id := util.SessionIDFromContext(ctx); id != "" {		return ctx	}	if util.HasExplicitSessionID(ctx) {		return ctx	}	if meta := logging.GetClientRequestMetadata(ctx); meta.SessionID != "" {		return util.WithSessionID(ctx, meta.SessionID)	}	evalPayload := opts.OriginalRequest	if len(evalPayload) == 0 {		evalPayload = payload	}	canonical := cliproxyauth.CanonicalSessionID(opts.Headers, evalPayload, opts.Metadata)	if canonical != "" {		return util.WithSessionID(ctx, canonical)	}	return ctx}