feat: fan reply updates across reblog chains, requery per post

A reply by a given blog at a given timestamp is the same reply
across the original post and every reblog of it. Drop PostID from
the UpdateNoteReplyText WHERE clause so a single API hit fills in
the replyText on every matching row at once.

Pair that with a per-iteration requery (limit 1) of the work list
so posts whose replies were already filled in as a side-effect of
a previous post's update are skipped without burning an API call.

.claude/settings.local.json

@@ -0,0 +1,7 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(dotnet build *)"
+    ]
+  }
+}