Update go.mod module line, all require/replace directives, and every
.go import path from forge.lthn.ai/core/go-blockchain to
dappco.re/go/core/blockchain. Add replace directives to bridge
dappco.re paths to existing forge.lthn.ai registry during migration.
Update CLAUDE.md, README, and docs to reflect the new module path.
Co-Authored-By: Virgil <virgil@lethean.io>
Performs handshake, REQUEST_CHAIN with genesis hash, reads
RESPONSE_CHAIN_ENTRY, then REQUEST_GET_OBJECTS with the first block
hash and verifies RESPONSE_GET_OBJECTS returns a non-empty block blob.
Also fixes the existing handshake test return code check — the C++
daemon handler returns 1 (not 0) on success.
Co-Authored-By: Charon <charon@lethean.io>
