Clockwork dev-20260205-9703a6fa

LMR: do shallower (#365)

Passed STC
```
Test  | do-shallower
Elo   | 2.40 +- 1.86 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.95 (-2.94, 2.94) [0.00, 3.00]
Games | N: 45022 W: 11164 L: 10853 D: 23005
Penta | [482, 5431, 10441, 5608, 549]
```
https://ob.cwchess.org/test/1154/

Passed LTC
```
Test  | do-shallower
Elo   | 2.03 +- 1.59 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=64MB
LLR   | 2.97 (-2.94, 2.94) [0.00, 3.00]
Games | N: 52152 W: 12307 L: 12003 D: 27842
Penta | [251, 6208, 12922, 6376, 319]
```
https://ob.cwchess.org/test/1183/

Bench: 15756000