[charon-flashloan] crate not in workspace members — clippy, test, and fmt silently skip it

[obchain]

Refs #39

File: Cargo.toml (root workspace manifest)

Problem

Root Cargo.toml workspace members:

members = [
    "crates/charon-core",
    "crates/charon-protocols",
    "crates/charon-scanner",
    "crates/charon-cli",
]

If crates/charon-flashloan is absent from this list, cargo test --workspace, cargo clippy --workspace --all-targets --all-features, and cargo fmt --all all silently exclude the crate. Every lint error, test failure, and format violation in charon-flashloan passes the CLAUDE.md pre-commit gate undetected.

Impact: All lints and tests in the flashloan crate are invisible to CI and pre-commit hooks. Bugs accumulate undetected until the crate is explicitly tested in isolation.

Fix

Add "crates/charon-flashloan" to the members array. Add charon-flashloan to [workspace.dependencies] so downstream crates reference it without path duplication:

charon-flashloan = { path = "crates/charon-flashloan" }

[obchain]

No code change needed. Verified in b9092e1 on feat/14-flashloan-router that crates/charon-flashloan is already listed in the root Cargo.toml [workspace.members] and exposed via [workspace.dependencies]; cargo build --workspace and cargo test --workspace both pick it up. Closing as already-fixed.