Migrate UUIDv7 generation to node:crypto

[puneetdixit200]

Closes #287.

Summary

• Add a server-local UUIDv7 helper backed by node:crypto, using native randomUUIDv7 when available and a randomBytes fallback for current supported runtimes.
• Update the Lucid base model and factories to use the shared helper.
• Remove the external uuid dependency and add focused UUIDv7 coverage.

Tests

• pnpm install --filter @fedimod/fires-server --frozen-lockfile --store-dir $PWD/.pnpm-store
• pnpm --filter @fedimod/fires-server -r format:check
• pnpm --filter @fedimod/fires-server -r lint
• pnpm --filter @fedimod/fires-server -r typecheck
• Direct UUIDv7 smoke test via ts-node-maintained

The full DB-backed test command needs the Postgres service from CI; locally it could not connect to 127.0.0.1:54321.

[changeset-bot]

🦋 Changeset detected

Latest commit: b98854f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@fedimod/fires-server	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR