fix(auth): store bearer tokens in native credentials

crates/ely_sync_client/Cargo.toml

@@ -7,6 +7,8 @@ rust-version.workspace = true
 
 [dependencies]
 base64.workspace = true
+cap-fs-ext.workspace = true
+cap-std.workspace = true
 chacha20poly1305.workspace = true
 ed25519-dalek.workspace = true
 ely_domain = { path = "../ely_domain" }
@@ -15,7 +17,7 @@ getrandom.workspace = true
 hkdf.workspace = true
 hmac.workspace = true
 hpke.workspace = true
-keyring.workspace = true
+keyring-core.workspace = true
 serde = { workspace = true }
 serde_json = { workspace = true }
 sha2 = { workspace = true }
@@ -24,5 +26,20 @@ ureq = { workspace = true, features = ["json"] }
 uuid = { workspace = true }
 zeroize.workspace = true
 
+[dev-dependencies]
+tempfile.workspace = true
+
+[target.'cfg(unix)'.dependencies]
+rustix = { workspace = true, features = ["process"] }
+
+[target.'cfg(target_os = "macos")'.dependencies]
+apple-native-keyring-store = { version = "1.0.0", features = ["keychain"] }
+
+[target.'cfg(target_os = "windows")'.dependencies]
+windows-native-keyring-store = "1.1.0"
+
+[target.'cfg(all(unix, not(any(target_os = "macos", target_os = "ios", target_os = "android"))))'.dependencies]
+zbus-secret-service-keyring-store = { version = "1.0.0", features = ["crypto-rust"] }
+
 [lints]
 workspace = true