use wrapping_add for cache counter

Dependencies

• [2] V55EAIWQ add src file LRU cache
• [3] ZVI4AWER woot contents_diff
• [*] 6YZAVBWU Initial commit

Change contents

• replacement in crates/inflorescence/src/main.rs at line 992
  [3.16306]→[3.16306:16330](∅→∅)
  − cache.counter += 1;
  [3.16306]

  [2.6465]
  + cache.counter = cache.counter.wrapping_add(1);