Function is_internal_schema_name 

pub fn is_internal_schema_name(name: &str) -> bool

Internal bookkeeping objects are not part of the public SQL schema envelope.

This mirrors the write master’s long-standing exclusion: HCTree’s journal, SQLite-owned objects, and underscore-prefixed Rindle metadata tables are not registered as application tables. Explicit registration still introspects the named table; this predicate is for whole-schema validation/enumeration.