feat(om-pm,oma-refresh)!: add search index cache

Author: eatradish

Cargo.lock

@@ -39,6 +39,7 @@ memchr = "2"
 serde = { version = "1", features = ["derive"] }
 apt-auth-config = { version = "0.2.0", path = "../apt-auth-config" }
 once_cell = "1.20"
+bincode = "1.3.3"
 
 [dev-dependencies]
 flume = "0.11"