fix(ci): disable reqwest default features to eliminate OpenSSL on musl builds

Requiring default-features=false on reqwest prevents native-tls/openssl-sys
from being pulled in as transitive dependencies, which broke static linking
on Alpine musl target. Also reverts invalid openssl-static package from CI.

- Cargo.toml: add default-features = false to reqwest dependency
- ci.yml: revert non-existent openssl-static package

Cargo.toml

@@ -64,7 +64,7 @@ addr = "0.15"
 if-addrs = "0.13"
 
 # HTTP client for enrollment communication
-reqwest = { version = "0.12", features = ["json", "rustls-tls"] }
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
 
 # Clap for CLI arguments
 clap = { version = "4", features = ["derive", "env"] }