feat(config): add GOCLAW_CRON_JOB_TIMEOUT env var for cron timeout (#1099)

Allow overriding the cron job execution timeout via env var, matching
the existing GOCLAW_* env var pattern used throughout the codebase.

Falls back to the existing default (10m) when unset or invalid, since
CronConfig.JobTimeoutDuration() already handles parse errors with a
slog.Warn and the DefaultJobTimeout constant.

Co-authored-by: will.nguyen <will.nguyen@gemcommerce.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/config/config_load.go

@@ -379,6 +379,9 @@ func (c *Config) applyEnvOverrides() {
 	if c.Tools.Browser.RemoteURL != "" {
 		c.Tools.Browser.Enabled = true
 	}
+
+	// Cron job execution
+	envStr("GOCLAW_CRON_JOB_TIMEOUT", &c.Cron.JobTimeout)
 }
 
 // Save writes the config to a JSON file.

internal/config/config_load_test.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+	"time"
 )
 
 // --- Default ---
@@ -429,3 +430,55 @@ func TestLoad_OwnerIDsEmpty(t *testing.T) {
 		}
 	}
 }
+
+// --- Cron job timeout env override ---
+
+func TestLoad_CronJobTimeout_EnvVar(t *testing.T) {
+	t.Setenv("GOCLAW_CRON_JOB_TIMEOUT", "1h")
+
+	cfg, err := Load("/nonexistent/path")
+	if err != nil {
+		t.Fatalf("load error: %v", err)
+	}
+	if got := cfg.Cron.JobTimeoutDuration(); got != time.Hour {
+		t.Fatalf("cron timeout: got %v, want 1h", got)
+	}
+}
+
+func TestLoad_CronJobTimeout_Invalid_FallsBackToDefault(t *testing.T) {
+	t.Setenv("GOCLAW_CRON_JOB_TIMEOUT", "not-a-duration")
+
+	cfg, err := Load("/nonexistent/path")
+	if err != nil {
+		t.Fatalf("load error: %v", err)
+	}
+	if got := cfg.Cron.JobTimeoutDuration(); got != DefaultJobTimeout {
+		t.Fatalf("invalid duration should fall back to default %v, got %v", DefaultJobTimeout, got)
+	}
+}
+
+func TestLoad_CronJobTimeout_Unset_UsesDefault(t *testing.T) {
+	cfg, err := Load("/nonexistent/path")
+	if err != nil {
+		t.Fatalf("load error: %v", err)
+	}
+	if got := cfg.Cron.JobTimeoutDuration(); got != DefaultJobTimeout {
+		t.Fatalf("unset env should use default %v, got %v", DefaultJobTimeout, got)
+	}
+}
+
+func TestLoad_CronJobTimeout_EnvOverridesFile(t *testing.T) {
+	dir := t.TempDir()
+	cfgPath := filepath.Join(dir, "config.json5")
+	os.WriteFile(cfgPath, []byte(`{"cron":{"job_timeout":"5m"}}`), 0644)
+
+	t.Setenv("GOCLAW_CRON_JOB_TIMEOUT", "30m")
+
+	cfg, err := Load(cfgPath)
+	if err != nil {
+		t.Fatalf("load error: %v", err)
+	}
+	if got := cfg.Cron.JobTimeoutDuration(); got != 30*time.Minute {
+		t.Fatalf("env should override file: got %v, want 30m", got)
+	}
+}