Skide MMR Display

✨ 2.0.4c

- BG Blitz now shows Blizzard's live faction matchmaking value on lobby entry instead of a protected score-field `0`.

- Protected Blitz values no longer force the display line to yellow; the line keeps its last accessible rating color or uses neutral gray when no snapshot exists.

- Final Blitz polling still replaces the lobby snapshot with the player's positive `postmatchMMR` once Blizzard makes it accessible.

- Solo Shuffle now rejects a protected final `0` and keeps its valid personal entry MMR visible until its positive personal `postmatchMMR` becomes accessible.

- Solo Shuffle and BG Blitz remain fully separate and specialization-specific.

- The character-wide 2v2 and 3v3 classification, capture, storage, and display paths were not modified.

- Added regression coverage for live Blitz `1,648` versus protected `0`, secret-value coloring, Solo final-zero protection, and cross-bracket/spec isolation.