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>
Scanner interface with V1Scanner implementation for v0/v1 transactions.
Derives ephemeral keys via ECDH, generates key images, and tracks
coinbase status and unlock times.
Co-Authored-By: Charon <charon@lethean.io>
