Slips for Sep 25

Seven tiered slips from 2x → 100x, built from fri's safe legs (no two from the same match). 4 of 7 tiers built.

• High-conviction: strict 72%/75% confidence threshold met
• Relaxed: strict threshold couldn't build the range; built from 55%+ legs as a fallback
• Cached 15 min as a soft lock. True 00:01 ET daily lock arrives with DB persistence.