Add binfile-import-max-zip-entries (default 500,000) and
binfile-import-max-object-size (default 100 MiB) config entries.
Both are configurable via PENPOT_BINFILE_IMPORT_MAX_ZIP_ENTRIES and
PENPOT_BINFILE_IMPORT_MAX_OBJECT_SIZE env vars.
Entry count is checked before processing begins. Per-object size is
checked after each storage object content is resolved.
AI-assisted-by: mimo-v2.5
Prevent unbounded memory allocation when a crafted binfile specifies
an excessively large object size. Apply the same 100 MiB limit that
read-stream! already enforces.
AI-assisted-by: mimo-v2.5