Previous fix removed '.' from the GetRepliesWithFilledText SELECT,
which broke processing of legacy null-substitute rows that need to be
re-fetched.
Restored '.' in the SELECT. To avoid the infinite loop when an actual
API reply is the literal string ".", normalize it to ". " (dot +
trailing space) inside UpdateNoteReplyText so the stored value no
longer matches the sentinel.
Also extended the fan-out UPDATE guard to match the SELECT criteria
(NULL / '' / '.') so legacy '.' rows in other reblog copies can be
filled in too. The guard still refuses to overwrite '?' or
already-fetched text.
Co-Authored-By: Claude Sonnet 4.6 <[email protected]>