I'm not going to be much help, but I recall being in a similar situation 10+ years ago IIRC. I found a binary in either the DBIC or Oracle path that either started or ended with
table that gave me a nice print out of all the tables. I was able to eventually get
DBIC::Schema::Loader to dump everything and I got
everything. Every little tiny object the database had, however it took forever to generate, and it generated waaaaay more schema than I wanted, I'm talking every user/schema I had read access to, every table, view, sequence, object, etc, etc, etc.. I think I ended up specifically targeting the a) schema and b) table(s) I was interested in.
update: have you tried passing dump_directory?
make_schema_at('Company::Project',
{ debug => 1, dump_directory => './lib'}, [credentials...]
);