Unify Type Imports Across Server Files

[babblebey]

Currently, type imports in server files are inconsistent: some import types from "server/db", while others use imports directly from generated Prisma files (e.g., "...generated/prisma..."). This inconsistency could cause maintainability issues and confusion for contributors.

Task:

• Identify all type imports in server-side code (especially those related to database types).
• Standardize all server files to import types from a single source (preferably from "server/db").
• Update all relevant files to use the unified import path.

Acceptance Criteria:

• All server files reference types from either "server/db" or consistently from the chosen path.
• No direct imports from generated Prisma files unless absolutely necessary (with a strong justification).
• Brief documentation or code comment explaining the standard, if needed.

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Example of current mixed import:

import type { db as appDb } from "~/server/db";
// elsewhere:
import type { Prisma } from "@prisma/client";

Benefits:

• Improves code consistency and maintainability
• Reduces risk of mismatches and breaking changes from Prisma updates

Please track files updated in the PR description or commit message.