feat: Add randomSpread and RunInterval to checks

This commit introduces two new optional parameters to the check configuration:

- `randomSpread`: This parameter allows specifying a random sleep time up to N seconds before a check is executed. This is useful to avoid all checks running at the same time.
- `RunInterval`: This parameter defines the minimum interval in seconds between two executions of a check. This is useful if gogios is run more frequently than a specific check should be.

The `README.md` has been updated to document these new features.

fix: Fix deadlock when skipping checks

This commit also fixes a deadlock that occurred when a check was skipped due to the `RunInterval` setting. The `inputWg.Done()` was not being called, causing the main goroutine to wait forever.

build: Replace Taskfile with Magefile

The `Taskfile.yml` has been replaced with a `Magefile.go` to manage the build process. This provides more flexibility and is more idiomatic for Go projects.

1 files changed, 24 insertions, 0 deletions

diff --git a/internal/state_test.go b/internal/state_test.go
new file mode 100644
index 0000000..aacc023
--- /dev/null
+++ b/internal/state_test.go
@@ -0,0 +1,24 @@
+package internal
+
+import (
+	"testing"
+	"time"
+)
+
+func TestAge(t *testing.T) {
+	state := state{checks: make(map[string]checkState)}
+
+	state.checks["Check Foo"] = checkState{Epoch: 0}
+	minAge := time.Duration(time.Now().Unix())
+
+	if reportedAge := state.age("Check Foo"); reportedAge < minAge {
+		t.Errorf("expected age >= %v, got %v", minAge, reportedAge)
+	}
+
+	maxAge := time.Duration(time.Now().Unix())
+	state.checks["Check Bar"] = checkState{Epoch: time.Now().Unix()}
+
+	if reportedAge := state.age("Check Bar"); reportedAge >= minAge {
+		t.Errorf("expected age < %v, got %v", maxAge, reportedAge)
+	}
+}