deps: move to snafu 0.9 and fjall 3

Cargo.toml

@@ -31,17 +31,18 @@ atmis = { version = "0.2.0", path = "crates/atmis" }
 # WHY: snafu is the fleet-wide error library per kanon RUST.md. Pinned at the
 # workspace root so the single heurema crate inherits via `workspace = true`,
 # matching the inheritance pattern adapter sub-crates will use later.
-snafu = "0.8"
+snafu = "0.9"
 
 # WHY: heurema's PersistenceBackend bound (crates/heurema/src/persistence.rs)
 # needs Serialize on save and DeserializeOwned on load, so heurema itself
 # depends on serde; the adapter crates add serde_json (atmis, thesauros) to
-# turn that into snapshot bytes. fjall is thesauros's storage engine, pinned
-# at the same major version kanon's own archeion crate already uses
-# fleet-wide.
+# turn that into snapshot bytes. fjall is thesauros's storage engine.
+# NOTE: kanon's archeion crate still pins fjall 2 (workspace root
+# `fjall = "2"`) — this bump is no longer at the "same major version"
+# fleet-wide; the two now diverge until archeion moves too.
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-fjall = "2"
+fjall = "3"
 
 [workspace.lints.clippy]
 pedantic = { level = "warn", priority = -1 }

crates/atmis/src/lib.rs

@@ -42,14 +42,14 @@ impl AtmisBackend {
     fn not_found(name: &str) -> HeuremaError {
         HeuremaError::IndexNotFound {
             name: name.to_owned(),
-            location: snafu::Location::default(),
+            location: std::panic::Location::caller(),
         }
     }
 
     fn codec_error(source: serde_json::Error) -> HeuremaError {
         HeuremaError::Persistence {
             source: PersistenceSource::new(source),
-            location: snafu::Location::default(),
+            location: std::panic::Location::caller(),
         }
     }
 

crates/heurema/tests/persistence_contract.rs

@@ -47,7 +47,7 @@ impl RecordingBackend {
     fn not_found(name: &str) -> HeuremaError {
         HeuremaError::IndexNotFound {
             name: name.to_owned(),
-            location: snafu::Location::default(),
+            location: std::panic::Location::caller(),
         }
     }
 }
@@ -91,7 +91,7 @@ impl FailingBackend {
     fn storage_failure() -> HeuremaError {
         HeuremaError::Persistence {
             source: PersistenceSource::new(MidError::default()),
-            location: snafu::Location::default(),
+            location: std::panic::Location::caller(),
         }
     }
 }