The release resolver needs to choose an available version that satisfies every supplied range. Finish the comparison logic so version components are treated numerically and incompatible constraints produce no selection.
Build the implementation in C# under /app, with /app/run.sh as its entry point. Read one JSON request from standard input and write one JSON result to standard output. Input has available versions and ranges of [minimum, maximum]. Versions are exactly three nonnegative decimal integer components separated by dots. Reject malformed versions or reversed ranges. Return the highest available version satisfying all inclusive ranges as a canonical string, or null. No ranges means unconstrained.
Reject inputs that violate an explicit validation rule with exit status 2, no standard output, and {"error":"invalid_input"} on standard error. For valid input, exit with status 0. Keep the implementation reusable for new inputs; it must work offline and must not depend on the example data being the only data it receives.
Repair or replace the unfinished /app/run.sh and add source files under /app. Malformed JSON must use the same invalid-input response. Do not read /tests or /oracle from the application.