migrate to changelog replication

.gitignore

@@ -52,7 +52,7 @@ test/goldens/failures/
 
 # -- pql per-repo state (index + planning DB, rebuilt from markdown) ----
 /.pql/*
-!/.pql/pql-plan.json
+!/.pql/changelog/
 
 # -- SQLite index files (defensive; should never land at repo root) ----
 *.sqlite
@@ -103,5 +103,5 @@ legacy/**/.coverage.*
 # frame0-wireframe local ID ↔ Frame0 ID mapping; per-machine state.
 *.idmap.json
 .pql/*
-!.pql/pql-plan.json
 !.pql/hooks/
+!.pql/changelog/