docs: improve database-design discoverability by adding description

[workflowsdir]

This PR adds a comprehensive description to the database-design skill to improve its discoverability by Dispatch, as requested in issue #70.

The description was updated in both .agent/skills/database-design/SKILL.md and .agent/ARCHITECTURE.md to ensure consistency.

New description:

Expert guidance on database design, architecture selection (SQL/NoSQL/Serverless), ORM optimization (Prisma, Drizzle), schema normalization, indexing strategies, and safe migration procedures.

Fixes #70.

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[Copilot]

Pull request overview

Adds/updates the database-design skill description metadata to improve Dispatch discoverability (per issue #70), and mirrors the summary in the architecture docs.

Changes:

• Expanded the database-design skill description in .agent/skills/database-design/SKILL.md.
• Updated the database-design row description in .agent/ARCHITECTURE.md.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
.agent/skills/database-design/SKILL.md	Updates skill frontmatter description to better match Dispatch discovery needs.
.agent/ARCHITECTURE.md	Updates the skills table entry to reflect the expanded database-design scope; also touches a scripts section heading.

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[Copilot]

The heading has an extra space after ## (likely left over from removing the replacement character �). Consider changing ## Scripts (2) to a properly formatted heading (e.g., ## Scripts (2) or restore the intended emoji) so the section title renders/reads correctly.

Suggested change

	## Scripts (2)
	## Scripts (2)