fix: example is broken, this fixes it

[kalbasit]

No description provided.

[kalbasit]

This change is part of the following stack:

• fix: example is broken, this fixes it #14 ◀

_{Change managed by git-spice.}

[gemini-code-assist]

Summary of Changes

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This pull request resolves issues in the example application by updating core dependencies and significantly refining the database code generation process. The changes standardize how bulk inserts are handled across different SQL drivers and align the generated code with the latest sqlc version, ensuring the example functions correctly and robustly within the sqlc-multi-db framework. Additionally, the development environment is made more consistent through Nix updates.

Highlights

• Go Module Updates: The Go version in the example module has been updated to 1.25.7, and the github.com/lib/pq dependency was introduced to support PostgreSQL operations.
• Code Generation Refactoring: The //go:generate directive was moved from example/pkg/database/generate.go (which was removed) to example/pkg/database/database.go, streamlining the code generation setup.
• Database Parameter Standardization: The AddBookTagsParams structure in the generated models and wrappers was adjusted to use generic Column1 and Column2 fields, enhancing compatibility across different database drivers (MySQL, PostgreSQL, SQLite).
• Generated Code Alignment: All generated SQL query files for MySQL, PostgreSQL, and SQLite were updated to reflect sqlc v1.30.0, including more explicit query formatting, improved error handling, and the addition of BookTag structs.
• Bulk Insert Logic Enhancement: The generator/templates.go logic for bulk insert parameter mapping was improved to support both name-based and positional field matching, making the generation process more robust.
• Nix Devshell Integration: The Nix devshell configuration now includes pkgs.sqlc and automatically updates the example/go.mod Go version, ensuring a consistent development environment.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 28.83%. Comparing base (17902e2) to head (5652589).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #14   +/-   ##
=======================================
  Coverage   28.83%   28.83%           
=======================================
  Files           6        6           
  Lines         697      697           
=======================================
  Hits          201      201           
  Misses        485      485           
  Partials       11       11           

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[gemini-code-assist]

Code Review

The pull request updates the Go version to 1.25.7 and adds the github.com/lib/pq dependency. It introduces a multi-database sqlc-multi-db generation setup, leading to changes in generated code across mysql, postgres, and sqlite database packages. Key changes include renaming AddBookTagsParams fields to Column1 and Column2 in generated_models.go and corresponding updates in wrapper functions, along with extensive reformatting and duplication of SQL queries as comments in generated querier.go and query.*.sql.go files. Review comments highlight the need to improve the descriptiveness of Column1 and Column2 by using sqlc.arg() in SQL queries, and point out redundant rows.Close() calls in mysqldb and sqlitedb generated code that should be removed.