🐛 fix(playbook): publish hidden ci test fixes

Unhide the tracked docs and test updates that were left under assume-unchanged, remove the shipped tsl-guide skill, and align the deploy_root-related test coverage with the current external-clone rules.

tests/test_no_backup_flags.py

@@ -6,6 +6,7 @@ from pathlib import Path
 
 ROOT = Path(__file__).resolve().parents[1]
 SCRIPT = ROOT / "scripts" / "playbook.py"
+DEFAULT_DEPLOY_ROOT = "docs/standards/playbook"
 
 
 def run_cli(*args):
@@ -26,6 +27,7 @@ class NoBackupFlagsTests(unittest.TestCase):
             config_body = f"""
 [playbook]
 project_root = "{tmp_dir}"
+deploy_root = "{DEFAULT_DEPLOY_ROOT}"
 
 [sync_rules]
 force = true
@@ -54,6 +56,7 @@ no_backup = true
             config_body = f"""
 [playbook]
 project_root = "{tmp_dir}"
+deploy_root = "{DEFAULT_DEPLOY_ROOT}"
 
 [sync_standards]
 langs = ["tsl"]