filtersToQ emitted `path:<folder>` for any non-root folder, but
PhotoPrism's `path:` operator is exact-by-default — so picking the
"2024" node in the folder tree returned zero hits when all photos
lived in date-stamped sub-folders (`2024/01`, `2024/02`, …). PP's
indexer always nests photos under YYYY/MM, so every year-level
folder was empty in the timeline.
PhotoPrism supports a trailing `*` wildcard, so emit
`path:"<folder>*"` instead:
path:"2024*" → matches `2024`, `2024/01`, `2024/02/...`, …
path:"2024/01*" → matches `2024/01` plus descendants — still
correct for a leaf folder.
Confirmed against the M0 instance: picking 2024 now returns the full
year's photos; 2024/01 still returns its direct contents.
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