cli: add start command and version package

Adds `claudomator start <task-id>` to queue a task via the running API
server. Adds internal/version for embedding VCS commit hash in the
server banner.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/internal/version/version.go b/internal/version/version.go
new file mode 100644
index 0000000..35136d4
--- /dev/null
+++ b/internal/version/version.go
@@ -0,0 +1,20 @@
+package version
+
+import "runtime/debug"
+
+// Version returns the VCS commit hash embedded by `go build`, or "dev" if unavailable.
+func Version() string {
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "dev"
+	}
+	for _, s := range info.Settings {
+		if s.Key == "vcs.revision" {
+			if len(s.Value) > 8 {
+				return s.Value[:8]
+			}
+			return s.Value
+		}
+	}
+	return "dev"
+}