parse-1c-build

Architecture of parse-1c-build: EPF/ERF unpack/pack pipeline (v8unpack, V8Reader, gcomp), BSL extraction layout (managed UUID.0 vs module/text vs form), meta/bin structure, and round-trip rebuild. Use when modifying Parser/Builder, extending BSL split/merge, debugging roundtrip mismatches, or working with the p1cb CLI.