Add ObjectPath query language

crates/pile-config/src/lib.rs

@@ -7,10 +7,14 @@ pub use post::*;
 mod misc;
 pub use misc::*;
 
+use crate::objectpath::ObjectPath;
+
+pub mod objectpath;
+
 pub static INIT_DB_TOML: &str = include_str!("./config.toml");
 
 #[test]
-#[expect(clippy::unwrap_used)]
+#[expect(clippy::expect_used)]
 fn init_db_toml_valid() {
 	toml::from_str::<ConfigToml>(INIT_DB_TOML).expect("INIT_DB_TOML should be valid TOML");
 }
@@ -56,7 +60,7 @@ pub struct FieldSpec {
 	pub r#type: FieldType,
 
 	/// How to find this field in a data entry
-	pub path: OneOrMany<String>,
+	pub path: OneOrMany<ObjectPath>,
 
 	/// How to post-process this field
 	#[serde(default)]