Optimize test suite with testing.Short() guards

- Add Short() guards to slow CLI tests (2-4s each)
- Add Short() guards to slow API/integration tests (3-11s)
- Add Short() guard to hanging daemon discovery test (29s timeout)
- Short test suite now runs in ~6s (down from 5+ minutes)

Run 'go test -short ./...' for fast iteration
Run 'go test ./...' for full coverage

Closes: bd-iov0

internal/rpc/comments_test.go

@@ -8,6 +8,9 @@ import (
 )
 
 func TestCommentOperationsViaRPC(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping slow RPC test in short mode")
+	}
 	_, client, cleanup := setupTestServer(t)
 	defer cleanup()
 

internal/rpc/version_test.go

@@ -13,6 +13,9 @@ import (
 const testVersion100 = "1.0.0"
 
 func TestVersionCompatibility(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping slow RPC test in short mode")
+	}
 	tests := []struct {
 		name          string
 		serverVersion string