feat(signer-turnkey): bump to 0.5 and add to main alloy package (#3043)

## Changes
- Bump turnkey_client from 0.4 to 0.5 (removes OpenSSL dependency)
- Add alloy-signer-turnkey to workspace dependencies
- Add alloy-signer-turnkey to main alloy package
- Add signer-turnkey feature flag matching AWS/GCP pattern
- Add turnkey module re-export in signers
- Add turnkey to eip712 feature for EIP-712 signing support

This makes the Turnkey signer consistent with AWS KMS and GCP KMS signers,
and enables integration with Foundry.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: rplusq <[email protected]>
Co-authored-by: Claude <[email protected]>
Co-authored-by: zerosnacks <[email protected]>

Author: 3 people

Cargo.toml

@@ -65,6 +65,7 @@ alloy-signer-gcp = { version = "1.0.41", path = "crates/signer-gcp", default-fea
 alloy-signer-ledger = { version = "1.0.41", path = "crates/signer-ledger", default-features = false }
 alloy-signer-local = { version = "1.0.41", path = "crates/signer-local", default-features = false }
 alloy-signer-trezor = { version = "1.0.41", path = "crates/signer-trezor", default-features = false }
+alloy-signer-turnkey = { version = "1.0.41", path = "crates/signer-turnkey", default-features = false }
 alloy-transport = { version = "1.0.41", path = "crates/transport", default-features = false }
 alloy-transport-http = { version = "1.0.41", path = "crates/transport-http", default-features = false }
 alloy-transport-ipc = { version = "1.0.41", path = "crates/transport-ipc", default-features = false }

crates/alloy/Cargo.toml

@@ -55,6 +55,7 @@ alloy-signer-gcp = { workspace = true, optional = true }
 alloy-signer-ledger = { workspace = true, optional = true }
 alloy-signer-local = { workspace = true, optional = true }
 alloy-signer-trezor = { workspace = true, optional = true }
+alloy-signer-turnkey = { workspace = true, optional = true }
 
 # transport
 alloy-transport = { workspace = true, optional = true }
@@ -268,6 +269,7 @@ signer-ledger-browser = ["signer-ledger", "alloy-signer-ledger?/browser"]
 signer-ledger-node = ["signer-ledger", "alloy-signer-ledger?/node"]
 signer-local = ["signers", "dep:alloy-signer-local"]
 signer-trezor = ["signers", "dep:alloy-signer-trezor"]
+signer-turnkey = ["signers", "dep:alloy-signer-turnkey"]
 signer-keystore = ["signer-local", "alloy-signer-local?/keystore"]
 signer-mnemonic = ["signer-local", "alloy-signer-local?/mnemonic"]
 signer-mnemonic-all-languages = [
@@ -329,6 +331,7 @@ eip712 = [
     "alloy-signer-aws?/eip712",
     "alloy-signer-gcp?/eip712",
     "alloy-signer-ledger?/eip712",
+    "alloy-signer-turnkey?/eip712",
     # TODO: https://github.com/alloy-rs/alloy/issues/201
     # "alloy-signer-trezor?/eip712",
 ]

crates/alloy/src/lib.rs

@@ -155,6 +155,10 @@ pub mod signers {
     #[cfg(feature = "signer-trezor")]
     #[doc(inline)]
     pub use alloy_signer_trezor as trezor;
+
+    #[cfg(feature = "signer-turnkey")]
+    #[doc(inline)]
+    pub use alloy_signer_turnkey as turnkey;
 }
 
 /// Low-level Ethereum JSON-RPC transport abstraction and implementations.

crates/signer-turnkey/Cargo.toml

@@ -31,7 +31,7 @@ alloy-signer.workspace = true
 async-trait.workspace = true
 thiserror.workspace = true
 tracing.workspace = true
-turnkey_client = "0.4"
+turnkey_client = "0.5"
 
 [dev-dependencies]
 k256 = { workspace = true, features = ["ecdsa"] }