test: move sqlite tests to tests/

No inline exceptions; migrate via sqlite::migrate, renamed diary/social tests.

crates/adapters/sqlite/src/repositories/diary/mod.rs

@@ -169,6 +169,3 @@ impl SqliteDiaryRepository {
             .map_err(crate::shared::map_sqlx_error)
     }
 }
-
-#[cfg(test)]
-mod tests;