chore: update architecture and documentation to reflect removal of MongoDB and transition to NAS storage for chapter content

- Updated `.env.example` to remove MongoDB configuration.
- Revised `ARCHITECTURE.md` to reflect changes in data orchestration and storage strategy.
- Removed `CHAPTER_SAVE_DEBUG.md` and `FIXES_APPLIED.md` as they are no longer relevant.
- Updated `CONTRACT.md` to include new error codes.
- Adjusted endpoint documentation in `CROSS_REPO_ENDPOINT_MATRIX.md` and `README.md` to align with the new import flow.
- Removed legacy import scripts and tables from the codebase.

scripts/wipe_db.js

@@ -1,60 +0,0 @@
-const { PrismaClient } = require('@prisma/client')
-const mongoose = require('mongoose')
-require('dotenv').config({ path: '.env.local' })
-require('dotenv').config()
-
-const prisma = new PrismaClient()
-
-async function main() {
-    console.log('Connecting to MongoDB...')
-    // Connect to MongoDB using MONGODB_URI
-    const mongoUri = process.env.MONGODB_URI
-    if (!mongoUri) {
-        throw new Error('MONGODB_URI is not defined in env')
-    }
-    await mongoose.connect(mongoUri)
-
-    // Wipe MongoDB Chapters
-    console.log('Wiping chapters from MongoDB...')
-    try {
-        const chapterSchema = new mongoose.Schema({}, { strict: false })
-        const Chapter = mongoose.models.Chapter || mongoose.model('Chapter', chapterSchema, 'chapters')
-        const res = await Chapter.deleteMany({})
-        console.log(`Deleted ${res.deletedCount} chapters.`)
-    } catch (e) {
-        console.error('Error wiping mongo chapters', e)
-    }
-
-    // Wipe PostgreSQL Content
-    console.log('Wiping Novels, Genres, Comments, Bookmarks from PostgreSQL...')
-    try {
-        // Delete in order to respect foreign keys if Cascade isn't perfect, but Cascade is set on most.
-        await prisma.comment.deleteMany({})
-        console.log('Deleted all comments.')
-
-        await prisma.bookmark.deleteMany({})
-        console.log('Deleted all bookmarks.')
-
-        await prisma.novelGenre.deleteMany({})
-        console.log('Deleted all novel_genres.')
-
-        await prisma.genre.deleteMany({})
-        console.log('Deleted all genres.')
-
-        await prisma.novel.deleteMany({})
-        console.log('Deleted all novels.')
-
-    } catch (error) {
-        console.error('Error wiping postgres', error)
-    }
-
-    console.log('Cleanup complete.')
-}
-
-main()
-    .catch(console.error)
-    .finally(async () => {
-        await prisma.$disconnect()
-        await mongoose.disconnect()
-        process.exit(0)
-    })