feat: publish Gamertan Tend preview source

Sanitized root snapshot from private source commit a72903c63e1753f9e6ffbf40453c0830bdfc05c5 and tree 295641e67eef5979da76746d8ae271249568263e. Private development history and workflows are excluded by the exact allowlist.

AI-assisted: OpenAI Codex helped implement, test, and audit this preview.
Signed-off-by: Cole Speelman <crspeelman@gmail.com>

internal/deploy/lock_other.go

@@ -0,0 +1,14 @@
+//go:build !linux
+
+// SPDX-License-Identifier: AGPL-3.0-only
+
+package deploy
+
+import "errors"
+
+type fileLock struct{}
+
+func acquireLock(string) (*fileLock, error) {
+	return nil, errors.New("deployment mutations require Linux")
+}
+func (*fileLock) Close() error { return nil }