refactor(save): remove the immediate-state-push org-sync machinery

The opt-in org-sync mode pushed Linear state immediately — on every TODO-keyword cycle (the org-after-todo-state-change hook) and on every buffer save (the after-save hook scanning the whole file). That's the last immediate-push path, and it contradicts the one-write-path model the rest of v2 builds, so I removed it: pearl-enable-org-sync / -disable-org-sync, pearl-org-hook-function, pearl-sync-org-to-linear, pearl-sync-current-heading-to-linear, and the now-orphaned pearl--process-heading-at-point, pearl--map-org-state-to-linear, and pearl--update-issue-state-async. This finishes the "make org-sync private" task — there was nothing left to make private.

Cycling a TODO keyword now marks state dirty (reconciled at the next save) instead of pushing. Saving the buffer pushes nothing. Re-introducing an auto-push on save is the separate "Automatic sync on save" task, which would call the save engine rather than this whole-file scanner.

I kept pearl--extract-org-heading-properties and pearl--get-todo-states-pattern. They're general heading/keyword readers, not org-sync-specific, and the keyword-cycle save (the keyword-derivation follow-up) needs exactly them. The obsolete sync tests are replaced by two that assert the contract: the sync commands are gone, and a keyword cycle pushes nothing.

1 files changed, 4 insertions, 16 deletions

diff --git a/tests/test-pearl-mapping.el b/tests/test-pearl-mapping.el
index 17eff82..2a96163 100644
--- a/tests/test-pearl-mapping.el
+++ b/tests/test-pearl-mapping.el
@@ -54,22 +54,10 @@
   (test-pearl--with-mapping '(("Todo" . "TODO"))
     (should (string-equal "TODO" (pearl--map-linear-state-to-org nil)))))
 
-;;; pearl--map-org-state-to-linear
-
-(ert-deftest test-pearl-map-org-state-to-linear-mapped-returns-state ()
-  "An org keyword present in the mapping returns its Linear state."
-  (test-pearl--with-mapping '(("Todo" . "TODO") ("In Progress" . "DOING"))
-    (should (string-equal "In Progress" (pearl--map-org-state-to-linear "DOING")))))
-
-(ert-deftest test-pearl-map-org-state-to-linear-unmapped-returns-nil ()
-  "An org keyword not in the mapping returns nil."
-  (test-pearl--with-mapping '(("Todo" . "TODO") ("Done" . "DONE"))
-    (should (null (pearl--map-org-state-to-linear "WAITING")))))
-
-(ert-deftest test-pearl-map-org-state-to-linear-nil-returns-nil ()
-  "A nil org keyword returns nil."
-  (test-pearl--with-mapping '(("Todo" . "TODO"))
-    (should (null (pearl--map-org-state-to-linear nil)))))
+;; pearl--map-org-state-to-linear (the keyword->state reverse map) was removed
+;; with the org-sync push path in save-model-v2; the keyword-cycle save will
+;; resolve through the team's states (the keyword-derivation task), not a flat
+;; reverse mapping.
 
 ;;; pearl--get-todo-states-pattern