Address review feedback from gemini-code-assist on hack/check-rd-presets.sh:26
and coderabbitai on hack/check-rd-presets.sh:37.
- Switch the jq enum extractor from a description-substring heuristic
(test("preset"; "i")) to a JSON path-suffix selector that matches
fields literally named resourcesPreset. Eliminates false positives
from unrelated fields whose descriptions happen to mention "preset".
- Use grep -F for literal enum membership so the "." in entries like
t1.nano cannot accidentally match arbitrary characters (e.g. a typo
t1xnano would have satisfied t1.nano under basic regex).
Signed-off-by: Aleksei Sviridkin <f@lex.la>