feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

internal/checkresult/result.go

@@ -0,0 +1,38 @@
+// Package checkresult holds the DB-free outcome of a single check execution.
+package checkresult
+
+import (
+	"time"
+)
+
+// CheckResult is the in-memory outcome of a single check execution.
+// The check packages build a CheckResult, then call SaveTo to persist
+// state, error, warnings, infos, and expiry back to the check row.
+type CheckResult struct {
+	State    string
+	Error    error
+	Warnings []string
+	Infos    []string
+	Duration time.Duration
+	Expires  *time.Time
+}
+
+// GetState returns the result state (OK/ERR/FAIL/WARN).
+func (r *CheckResult) GetState() string {
+	return r.State
+}
+
+// GetError returns the result error, if any.
+func (r *CheckResult) GetError() error {
+	return r.Error
+}
+
+// GetWarnings returns the human-readable warnings produced by the check.
+func (r *CheckResult) GetWarnings() []string {
+	return r.Warnings
+}
+
+// GetInfos returns the human-readable info messages produced by the check.
+func (r *CheckResult) GetInfos() []string {
+	return r.Infos
+}