Spell Reflect Borders - Platynator addition

1.4.0 
- Optional cooldown tint; solid/glow/pulse effects; Spell Reflection icon; specialisation overrides; expanded preview; scanner profiling and diagnostics. All features default to current behaviour.
- Preserve existing shared/per-character settings and targeted-cast / Spell Reflection behaviour.
- Stop restarting the scan ticker on every colour, thickness, or pulse settings change.
- Add cast, cooldown and nameplate event-assisted updates while retaining a 0.1s safety poll.
- Stop allocating a temporary child-frame table for each nameplate scan.
- Throttle pulse updates to 25 Hz rather than repainting at full display frame rate.
- Ensure preview animation runs only while preview is shown; throttle it to 25 Hz.
- Remove the recurring status refresh in the hidden/idle settings panel.
- Add scan-pass and revisited-bar diagnostics.