add runtime debugging signals and convert to magev0.10.0

- Add SIGUSR1 handler for goroutine stack dumps when app hangs
- Add SIGUSR2 handler for full profiling (heap, cpu, block)
- Add --debug-dir flag for configurable debug output location
- Convert build system from go-task to mage
- Update documentation with debugging workflow
- Bump version to 0.10.0

1 files changed, 21 insertions, 0 deletions

diff --git a/internal/debug/signals_windows.go b/internal/debug/signals_windows.go
new file mode 100644
index 0000000..89030f3
--- /dev/null
+++ b/internal/debug/signals_windows.go
@@ -0,0 +1,21 @@
+// +build windows
+
+package debug
+
+import (
+	"fmt"
+	"os"
+)
+
+// SetDebugDir sets the directory where debug output files will be written.
+// On Windows, signal handlers are not supported, so this is a no-op.
+func SetDebugDir(dir string) {
+	// No-op on Windows
+}
+
+// InitSignalHandlers sets up signal handlers for runtime diagnostics.
+// On Windows, SIGUSR1 and SIGUSR2 are not available, so this prints a warning.
+func InitSignalHandlers() {
+	fmt.Fprintln(os.Stderr, "debug: signal handlers not supported on Windows")
+	fmt.Fprintln(os.Stderr, "debug: consider using GODEBUG environment variable or pprof HTTP endpoint")
+}