Tier-B test-fixture suppression list. Loaded from the bundled
crates/cli/data/suppressions/test-fixtures.toml via include_str!
at build time; previously hardcoded in orchestrator.rs as a chain
of cred == concat!("sk_", "live_", …) branches. Moving the data
out of code lets a user contribute a new suppression without
re-compiling, lets the differential bench harness honour the same
list, and lets users opt out entirely via
--no-suppress-test-fixtures.
Set to true if the scanner thread panicked during scan_sources.
Read at the end of run() so a crashed scanner exits with a
non-zero code instead of silently reporting “no findings, all
clean” - that was the prior behavior and would mislead any
caller piping keyhog into CI as a gate.