test: move small adapter tests to tests/

event-publisher, export, rss, media-server, object-storage, nats(config).
Kept inline (private fn, no public path): nats src/subject.rs
tests::{review_logged_subject,review_updated_subject,movie_discovered_subject,
consumer_subject_filter_appends_wildcard} - event_to_subject/consumer_subject_filter private.
object-storage build_local_store tests rewritten via StorageConfig::from_config.

crates/adapters/nats/src/config.rs

@@ -35,7 +35,3 @@ impl NatsConfig {
         })
     }
 }
-
-#[cfg(test)]
-#[path = "tests/config.rs"]
-mod tests;

crates/adapters/nats/src/tests/config.rs

@@ -1,40 +0,0 @@
-use super::*;
-
-fn section(url: Option<&str>, mode: &str) -> ::config::NatsConfig {
-    ::config::NatsConfig {
-        url: url.map(str::to_owned),
-        mode: mode.into(),
-        ..Default::default()
-    }
-}
-
-#[test]
-fn errors_without_nats_url() {
-    assert!(NatsConfig::from_config(&::config::NatsConfig::default()).is_err());
-}
-
-#[test]
-fn defaults_with_only_url() {
-    let cfg = NatsConfig::from_config(&::config::NatsConfig {
-        url: Some("nats://localhost:4222".into()),
-        ..Default::default()
-    })
-    .unwrap();
-    assert_eq!(cfg.url, "nats://localhost:4222");
-    assert_eq!(cfg.mode, NatsMode::JetStream);
-    assert_eq!(cfg.subject_prefix, "movies-diary.events");
-    assert_eq!(cfg.stream_name, "MOVIES_DIARY_EVENTS");
-    assert_eq!(cfg.consumer_name, "worker");
-}
-
-#[test]
-fn core_mode_parsed() {
-    let cfg = NatsConfig::from_config(&section(Some("nats://test:4222"), "core")).unwrap();
-    assert_eq!(cfg.url, "nats://test:4222");
-    assert_eq!(cfg.mode, NatsMode::Core);
-}
-
-#[test]
-fn invalid_mode_errors() {
-    assert!(NatsConfig::from_config(&section(Some("nats://test:4222"), "kafka")).is_err());
-}