refactor(store): add sql conversions for db binary types

[Mr-kay-cloud2]

Summary

• Adds SqlTypeConvert implementations for common binary database types used by the store.
• Centralizes byte serialization/deserialization for account, note, transaction, and storage map primitives.
• Adds roundtrip and malformed-byte tests for the new conversion path.

Closes #1477

Testing

• rustfmt +nightly --edition 2024 crates/store/src/db/models/conv.rs
• cargo test -p miden-node-store db::models::conv::tests --lib could not run locally on Windows because the miden-agglayer dependency checkout fails on an invalid : path in a submodule file.