BREAKING CHANGE: Header size increased from 64 to 72 bytes
- Expand DID hints from 20 to 24 bytes (192-bit, 2^96 collision resistance)
- Clarify timestamp as u64 nanoseconds (Bytes 60-67, big-endian)
- Update frame payload capacities (-8 bytes per frame class)
- All tests passing (14/14 L0 tests)
Rationale:
- 24-byte DID hints provide future-proof routing scalability
- 8-byte overhead per frame is negligible (0.6% loss on Standard frames)
- Aligns with Sovereign Time Protocol (RFC-0105) L0/L1 split
Files modified:
- l0-transport/lwf.zig: Header structure, serialization, tests
- l0-transport/time.zig: New file for L0 time primitives
- build.zig: Time module dependencies
RFC Impact: RFC-0000 (LWF Wire Protocol), RFC-0105 (Sovereign Time)
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