Introduce run_db_operation_sync and run_db_operation

These functions are designed as a single funnel to talk to the database,
whether it is synchronous or asynchronous.

This single funnel will log SQL queries and slow operations, providing a clear
and unified debug message for the problematic query, so it can be optimized
accordingly (for instance, missing indexes or unbound SQL requests).

crates/cdk-sql-common/src/lib.rs

@@ -11,6 +11,7 @@ pub mod stmt;
 pub mod value;
 
 pub use cdk_common::database::ConversionError;
+pub use common::{run_db_operation, run_db_operation_sync};
 
 #[cfg(feature = "mint")]
 pub mod mint;