This pull request includes changes to the hashtable_mcmp_op_get_by_index function in multiple files to improve the handling of the database_number parameter. The changes ensure that the database_number is correctly passed and updated within the function calls.

Improvements to hashtable_mcmp_op_get_by_index function:

• src/data_structures/hashtable/mcmp/hashtable_op_get.c: Modified the hashtable_mcmp_op_get_by_index function to pass database_number as a pointer and update it within the function. [1] [2]
• src/data_structures/hashtable/mcmp/hashtable_op_get.h: Updated the function signature of hashtable_mcmp_op_get_by_index to reflect the change in database_number parameter type.

Updates to function calls:

• src/storage/db/storage_db.c: Adjusted the call to hashtable_mcmp_op_get_by_index to pass database_number as a pointer and added a check to ensure the entry is from the correct database before deletion.
• src/storage/db/storage_db_snapshot.c: Modified the call to hashtable_mcmp_op_get_by_index to pass database_number as a pointer.