An entry is still being returned at the moment it should expire. Fix the cache implementation so reads, updates and expiry checks use one consistent boundary rule.
Build the implementation in Rust 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 is an ordered list of operations with nondecreasing integer time and op set/get. Set includes key, value and nonnegative integer ttl; expiry is time+ttl. Get returns null when absent or time >= expiry. Return only get results. Reject decreasing time, negative ttl or unknown operations. Repair the included faulty starter.
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.