Serialize OCSP Redis snapshots with CBOR

ocsp-responder/Cargo.toml

@@ -11,7 +11,7 @@ tower-http = { version = "0.6", features = ["limit", "trace", "timeout"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter", "fmt"] }
 serde = { version = "1", features = ["derive"] }
-serde_json = "1"
+cbor2 = "1"
 serde_yaml = "0.9"
 chrono = { version = "0.4", features = ["serde"] }
 thiserror = "2"