Expand SQL checklists to their own

### Type of Content Suggestion

Add a new topic for recommendations (aka a new checklist)

### Description of Suggestion

We should have a checklist for each SQL resource, ie MI, DB, Server on VM. Each checklist would include all 5 pillars of WAF recommendations

### Context and Rationale

_No response_

### References or Examples

_No response_

Review the repository's existing checklist topics and the current SQL, managed database, and server-on-VM guidance before starting. Define separate checklists for each SQL resource, ensuring each covers all five WAF pillars; done means the new topics are complete and consistent with the existing checklist structure.

Written by the indexing model from the issue text.