Release StrataGate DSH 0.2.25

[diqierjia]

Summary

• ship the 0.2.24 graph/timeline UI baseline
• replace sealed DSH ranges with current decayed L0-L5 Block representations
• synchronize native Block checkpoints after decay, manual lifts, and lambda changes
• keep openTail/tool chains native and dynamic context limited to cross-conversation long-term memory

Verification

• 90 tests passed
• TypeScript checks passed
• build and package verification passed
• npm audit: 0 vulnerabilities