The log viewer was artificially limiting display to 2000 lines
regardless of user's requested amount. Users could request 10k, 40k,
or 50k lines but only 2000 were ever shown.
Changes:
- Remove the hardcoded $maxDisplayLines = 2000 limit in the view
- Add MAX_LOG_LINES constant (50,000) in GetLogs component
- Enforce maximum limit in backend to prevent extremely large requests
- Update input field with max attribute and tooltip
Fixes#7803