Implements the source PDF's 'put(C,Z,Y,X,bytes,flags)' + 'scan_by_flag'
associative-storage API so records are discoverable by WHAT they are
(event type / doc_type metatag) rather than WHERE they live (coordinate
path) — the 'log lookup by query' the OS layers want.
cubestore:
- CubeStore::scan_by_flag(u16) / scan_by_type(&str): predicate scans
over decoded CubeHeader (not prefix scans).
- CubeStore::query_by_flag / query_by_type: same, but also return the
decoded (label, header, body) so a query tool can present results.
- get_record's raw/un-enveloped fallback now refresh_flags() so
synthesized headers carry SIZE_BYTES and are visible to flag queries.
- regression tests: scan_by_flag_finds_typed_records,
scan_by_type_event_lookup.
cubesys (daemon):
- new 'put' verb: enveloped write with optional doc_type=/title=
metatags (the PDF's put API). rawput remains for bulk/append payloads.
- ConcurrentStore::query_doc_type was already the backing predicate the
'query <doc_type>' verb uses; it now matches these typed records.
Proven end-to-end in the VM: 'cubec query klog' returns the kernel-log
index record (doc_type=klog) published by cube-os-klog.sh, and
'cubec query fn' returns the 8 pre-existing typed program records.
CUBELinux-2
2ff1dff02b