Function break_edges_table

tests/mcp_suite/mcp_handler_test.rs:14395–14401

Renames the `edges` table so every edge query on the open connection fails while node and file queries keep working.

(cg: &TraceDecay)

/// Renames the `edges` table so every edge query on the open connection
/// fails while node and file queries keep working.
async fn break_edges_table(cg: &TraceDecay) {
    cg.db()
        .conn()
        .execute("ALTER TABLE edges RENAME TO edges_broken", ())
        .await
        .unwrap();
}

#[tokio::test]
async fn simplify_scan_surfaces_store_failure_instead_of_no_findings() {