v0.5.4

Fix one-shot LiveSync replication stopping before all matching notes have been received.

• Continue scanning _changes through runs of filtered-out chunk documents until the requested number of matching rows is found or the database is exhausted.
• Report the number of remaining changes in pending instead of always returning zero.
• Add regression coverage for filtered all_docs and main_only feeds, trailing chunks, and unfiltered pagination.

Validation: 161 tests passed, type checking and the package build passed, and a PouchDB 9 one-shot replication check received notes after long runs of chunk documents.