Bound the semantics loader: at most 1 MiB is read, containers may nest
at most eight levels, and a RecursionError from the JSON parser becomes
a SemanticsError instead of escaping.
The table is no longer loaded at import. get_semantics() reads it on
first use and caches only a valid result, and the resolver imports it
lazily, only for a profile with semantics on. The default ingestion
profile never imports the module, so a missing or corrupt table cannot
break scan, monitor or admin import. Inspection of a prompt graph with
an unusable table is unresolved with the reason "Inspection node
semantics are unavailable" and an error log, rather than a crash.
INSPECTION_PROFILE now has semantics on; no strategy consumes the table
yet, so resolution is unchanged.
Vito Sansevero
9424cd2e35