runner/logfile: write duration line to log header (T2.3)

Pass durationMS to writeRunLog and include it as 'duration' in the
log header for persistence.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/domain/record.go

@@ -12,4 +12,5 @@ type RunRecord struct {
 	Detail     string `yaml:"detail"`
 	LogFile    string `yaml:"log_file,omitempty"`
 	Output     string `yaml:"output,omitempty"`
+	DurationMS int64  `yaml:"duration_ms,omitempty"`
 }

src/runner/logfile.go

@@ -11,7 +11,7 @@ import (
 	"gitea.mixdep.ru/mix/gosentry/src/domain"
 )
 
-func writeRunLog(logsDir string, job domain.Job, trigger string, state string, detail string, output string, started time.Time) string {
+func writeRunLog(logsDir string, job domain.Job, trigger string, state string, detail string, output string, durationMS int64, started time.Time) string {
 	if strings.TrimSpace(logsDir) == "" {
 		return ""
 	}
@@ -23,8 +23,8 @@ func writeRunLog(logsDir string, job domain.Job, trigger string, state string, d
 	// avoid characters that are invalid on Windows or awkward on shells.
 	fileName := started.Format("20060102-150405") + "_" + sanitizeFileName(job.Name) + ".log"
 	path := filepath.Join(logsDir, fileName)
-	content := fmt.Sprintf("time: %s\njob_id: %d\njob_name: %s\ntrigger: %s\nstate: %s\ndetail: %s\ncommand: %s\narguments: %s\nstart_only: %t\n\n%s\n",
-		started.Format("2006-01-02 15:04:05"), job.ID, job.Name, trigger, state, detail, job.Command, logArguments(job.Arguments), job.StartOnly, output)
+	content := fmt.Sprintf("time: %s\njob_id: %d\njob_name: %s\ntrigger: %s\nstate: %s\ndetail: %s\nduration: %d\ncommand: %s\narguments: %s\nstart_only: %t\n\n%s\n",
+		started.Format("2006-01-02 15:04:05"), job.ID, job.Name, trigger, state, detail, durationMS, job.Command, logArguments(job.Arguments), job.StartOnly, output)
 	if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
 		return ""
 	}

src/runner/runner.go

@@ -27,9 +27,12 @@ func RunJob(ctx context.Context, job *domain.Job, trigger string, logsDir string
 	var output string
 	var state string
 	var detail string
+	var durationMS int64
 	if job.StartOnly {
 		invocation := jobInvocation(context.Background(), *job)
 		state, detail, output = startJobOnly(invocation, *job, started)
+		// StartOnly jobs don't wait for process exit, so no meaningful duration.
+		durationMS = 0
 	} else {
 		var stdoutBuf strings.Builder
 		var stderrBuf strings.Builder
@@ -44,13 +47,14 @@ func RunJob(ctx context.Context, job *domain.Job, trigger string, logsDir string
 
 		err := command.Run()
 		duration := time.Since(started).Round(time.Millisecond)
+		durationMS = duration.Milliseconds()
 		output = formatOutput(stdoutBuf.String(), stderrBuf.String())
 		state, detail = runStateDetail(err, runCtx.Err(), duration)
 	}
 
 	now := time.Now()
 	timestamp := now.Format("2006-01-02 15:04:05")
-	logFile := writeRunLog(logsDir, *job, trigger, state, detail, output, now)
+	logFile := writeRunLog(logsDir, *job, trigger, state, detail, output, durationMS, now)
 
 	// The runner is now pure with respect to the job: it returns a RunRecord and
 	// lets the caller fold that record into the job's JobRuntime. Run state no
@@ -64,6 +68,7 @@ func RunJob(ctx context.Context, job *domain.Job, trigger string, logsDir string
 		Detail:     detail,
 		LogFile:    logFile,
 		Output:     output,
+		DurationMS: durationMS,
 	}
 }