wip: paren balance fixes in policy blocks + engineering standards scaffolding

- Fix unbalanced parens in org-skill-policy.org (8 blocks)
- Add org-skill-engineering-standards.lisp scaffolding
- Add org-skill-self-fix.lisp helper
- Add test runners and tool-permissions tests

Note: Some fixes may be over-corrections. Full structural audit needed.

library/gen/org-skill-engineering-standards.lisp

@@ -0,0 +1,19 @@
+(in-package :opencortex)
+
+(defun verify-git-clean-p (&optional (dir *project-root*))
+  "Returns T if the git repository at DIR has no uncommitted changes."
+  (let ((status (uiop:run-program (list "git" "-C" (namestring dir) "status" "--porcelain")
+                                  :output :string
+                                  :ignore-error-status t)))
+    (string= "" (string-trim '(#\Space #\Newline #\Tab) status))))
+
+(defskill :skill-engineering-standards
+  :priority 1000
+  :trigger (lambda (ctx) t)
+  :probabilistic nil
+  :deterministic (lambda (action context)
+                    (declare (ignore action))
+                    (let ((dirty (verify-git-clean-p)))
+                      (unless dirty
+                        (harness-log "ENGINEERING STANDARDS: Warning - Working tree is dirty. Commit before modifying files.")))
+                    nil))