Rust: Fill some gaps in our database models.

[geoffw0]

Fill in some gaps in our models of database sources and sinks.

Only partially tested, as these models are quite similar to existing models and to each other. I've also done some local testing and will do a DCA run in case of any surprises.

[Copilot]

Pull Request Overview

This PR fills gaps in database security models for Rust by adding missing SQL injection sinks and database source models across multiple database frameworks. The changes enhance security analysis capabilities by ensuring comprehensive coverage of database operations.

• Adds missing SQL injection sink models for previously uncovered database methods
• Adds database source models for data retrieval operations that were not tracked
• Includes test cases to validate the new security models

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
rust/ql/test/library-tests/frameworks/rusqlite/main.rs	Adds test cases for new rusqlite security models
rust/ql/test/library-tests/frameworks/postgres/main.rs	Adds test cases for postgres security models including SimpleQueryRow
rust/ql/lib/codeql/rust/frameworks/tokio-postgres.model.yml	Adds query_one sink and SimpleQueryRow source models
rust/ql/lib/codeql/rust/frameworks/sqlx.model.yml	Adds Row source models for data retrieval methods
rust/ql/lib/codeql/rust/frameworks/rusqlite.model.yml	Fixes syntax error and adds prepare_cached sink model
rust/ql/lib/codeql/rust/frameworks/postgres.model.yml	Adds simple_query sink and Row/SimpleQueryRow source models

[geoffw0]

DCA LGTM.