[codex] clean selfhost compile output

[Neftedollar]

Summary

• filter embedded parser self-test chatter from lllc-bootstrap.sh self compile/check/next daily paths
• move parser self-tests out of Std.Parser.main into Std.ParserSelfTest for future bootstrap artifacts
• add e2e first-line gates so check starts with JSON and compile starts with generated source

Validation

• ./tools/check-selfhost-ci.sh
• ./tools/check-selfhost-e2e.sh
• git diff --check
• wrapper smoke: self compile --target fs spec/examples/valid/26-operators-precedence.lll | head -n 1 starts with module Example.OperatorsPrecedence
• wrapper smoke: self check spec/examples/valid/26-operators-precedence.lll | head -n 1 starts with JSON

Note

Raw bootstrap artifacts can still contain the old embedded Std.Parser.main until the next artifact refresh. The daily wrapper path is clean now; the source rename prevents this from recurring in future artifacts.