feat: support ssolc version selection

[drappi-ai]

Summary

When seismic = true, ssolc is resolved from PATH and any solc version specified in foundry.toml is ignored with a warning. We should support version selection so users can pin specific ssolc versions (e.g. via a version manager or multiple installed binaries).

Current behavior

If a user sets solc = "0.8.31" in foundry.toml, they get:

Warning: ssolc does not support version selection (requested 0.8.31), using `ssolc`

Code locations to change

crates/config/src/lib.rs — ensure_solc()

SolcReq::Version(_) => {
    // TODO: support using different ssolc versions
    // For now, ignore the version request — use ssolc from PATH
    let ssolc_path = self.get_default_ssolc_path()?;

This is where version-aware resolution would go — e.g. looking up ssolc-0.8.31 in PATH or a managed install directory.

crates/config/src/lib.rs — get_default_ssolc_path()

pub fn get_default_ssolc_path(&self) -> Result<PathBuf, SolcError> {
    let path = PathBuf::from("ssolc");

Would need a version parameter to resolve e.g. ssolc-0.8.31 or a versioned install path.

crates/test-utils/src/util.rs — test template config

// TODO: set to SolcReq::Version when ssolc supports version selection
solc: None,

Re-enable version pinning in the test template once supported.

Search

All relevant TODOs can be found by searching for:

grep -r "TODO.*ssolc.*version" crates/