nix develop -c mix setupinstalls deps, creates/migrates DB, and builds assets.nix develop -c mix testruns the full test suite.nix develop -c mix test path/to/test.exsruns focused tests.nix develop -c mix compile --warnings-as-errorscatches compile regressions.nix develop -c mix credo --strictruns lint.nix develop -c mix formatformats;nix develop -c mix format --check-formattedverifies formatting.bin/rpc 'Reencodarr.Diagnostics.status()'and sibling diagnostics helpers inspect the running system.