refactor(schema): remove unused verification_tokens table

[aqib-rx]

verification_tokens was a leftover from the retired Auth.js/NextAuth integration — nothing reads or writes it (the only DB op was a cleanup of expired rows). Email verification uses email_verification_tokens; resets use password_reset_tokens. Removed from the 3 dialect schema defs + aggregator, CORE_TABLE_NAMES, the PG re-export, the dialect bundles, the SQLite core DDL, the runtime cleanup-delete, the auth types, and the test fixtures/snapshot.

New installs no longer create it; existing DBs keep the empty table until a reset (optional: DROP TABLE IF EXISTS verification_tokens).

Summary

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would change existing behavior)
• Documentation update
• Refactor / chore (no user-facing change)

Related issues

Changeset

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• I added a changeset (or this PR only touches non-publishable code: docs, tests, internal tooling, apps/*)
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Test plan

• pnpm lint
• pnpm check-types
• pnpm build
• Manually verified the change

Checklist

• I read CONTRIBUTING (if it exists)
• My commits follow the Conventional Commits spec (enforced by commitlint)
• I targeted the main branch
• I updated relevant documentation

Screenshots / recordings

Notes for reviewers

[github-actions]

PR title fails Conventional Commits check

Unknown scope "schema" found in pull request title "refactor(schema): remove unused verification_tokens table". Scope must match one of: nextly, admin, client, ui, adapter-postgres, adapter-mysql, adapter-sqlite, adapter-drizzle, storage-s3, storage-vercel-blob, storage-uploadthing, plugin-form-builder, create-nextly-app, eslint-config, prettier-config, tsconfig, playground, root, ci, docs, deps, release.

Examples of valid titles:

• feat(admin): add role manager dialog
• fix(adapter-postgres): handle connection pool exhaustion
• chore(deps): bump zod to 4.2.0