Replay: typed-input checks accept partial OCR matches and retry after possibly stray input #1478

The pixel and OCR typed-input check passes at 80% of the value, and on any pixel change for values under 4 characters (runtime/replayer.py:16598-16604). Dropped RDP keystrokes or a different guest keyboard layout pass. A no-change result re-clicks and retypes (:16670-16760) even though the first keystrokes may have gone to another window. Windows-agent typing has no foreground check.

Proposed fix: require an exact squashed match for parameter values. On pixel and native backends, halt instead of retrying after unguarded delivery, or re-check the foreground window per chunk.

Found by the realism audit (docs/audits/REALISM_AUDIT.md, #1467), rank 15 and 16.