fix: safely re-partition objects_s during integration test

- Re-order integration test to create test data, load into `objects_s` via temporary partitions covering all values so `min`/`max` bounds queries by the user prompt succeed.
- Replace `DROP TABLE ... CASCADE` with `ALTER TABLE ... DETACH PARTITION` when dynamically re-partitioning the table to prevent the 200,000 generated test rows from being permanently deleted.
- Re-insert rows from detached parent-less partitions into the newly partitioned table before final tests assertions to ensure the state successfully migrates.

Co-authored-by: soniapi <396009+soniapi@users.noreply.github.com>

Author: google-labs-jules[bot]

tests/integration_test.rs

@@ -62,6 +62,15 @@ async fn test_end_to_end_sequence() {
         .execute(&mut connection)
         .unwrap();
 
+    // Re-create a default partition so `fill_data` can insert rows BEFORE the user prompts.
+    // The partitions must encompass all values to allow random generation to insert.
+    sql_query("CREATE TABLE objects_s_100000_below PARTITION OF objects_s FOR VALUES FROM (MINVALUE) TO (100000.00);")
+        .execute(&mut connection)
+        .unwrap();
+    sql_query("CREATE TABLE objects_s_100000_above PARTITION OF objects_s FOR VALUES FROM (100000.00) TO (MAXVALUE);")
+        .execute(&mut connection)
+        .unwrap();
+
     // 6. Generate 200,000 rows natively in Rust
     println!("Generating test data using rust_xlsxwriter...");
     let mut workbook = Workbook::new();
@@ -165,8 +174,32 @@ async fn test_end_to_end_sequence() {
     sql_query(drop_below).execute(&mut connection).unwrap();
     sql_query(drop_above).execute(&mut connection).unwrap();
 
+    // Detach the default 100000 partitions to keep the data safe
+    sql_query("ALTER TABLE objects_s DETACH PARTITION objects_s_100000_below;")
+        .execute(&mut connection)
+        .unwrap();
+    sql_query("ALTER TABLE objects_s DETACH PARTITION objects_s_100000_above;")
+        .execute(&mut connection)
+        .unwrap();
+
     divider(&mut connection, divide_s);
 
+    // Insert the data back into the dynamically created partitions
+    sql_query("INSERT INTO objects_s SELECT * FROM objects_s_100000_below;")
+        .execute(&mut connection)
+        .unwrap();
+    sql_query("INSERT INTO objects_s SELECT * FROM objects_s_100000_above;")
+        .execute(&mut connection)
+        .unwrap();
+
+    // Now it's safe to drop the old detached tables
+    sql_query("DROP TABLE IF EXISTS objects_s_100000_below;")
+        .execute(&mut connection)
+        .unwrap();
+    sql_query("DROP TABLE IF EXISTS objects_s_100000_above;")
+        .execute(&mut connection)
+        .unwrap();
+
     // 7. Calculate mid-price and cost
     let target_type_t = "TRADE".to_string();
     let target_type_a = "ASK".to_string();