added backend-mgmt for dataset/dataset_entry and utterances, this includes upload and also displaying of the dataset on the admin pages

src/lib/model/dataset.ts

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+import { sqliteTable, text, integer, real } from 'drizzle-orm/sqlite-core';
+import { relations } from 'drizzle-orm';
+import { dataset_entry } from './dataset_entry';
+
+// Define the dataset table schema
+export const dataset = sqliteTable('dataset', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  name: text('name').notNull(),
+  createdAt: integer('created_at', { mode: 'timestamp' })
+    .notNull()
+    .default(new Date()),
+  updatedAt: integer('updated_at', { mode: 'timestamp' })
+    .notNull()
+    .default(new Date())
+});
+
+export const datasetRelations = relations(dataset, ({ many }) => ({
+  entries: many(dataset_entry)
+}));
+
+// Create a type for dataset records based on the schema
+export type Dataset = typeof dataset.$inferSelect;
+export type NewDataset = typeof dataset.$inferInsert;

src/lib/model/dataset_entry.ts

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+import { sqliteTable, text, integer, real } from 'drizzle-orm/sqlite-core';
+import { relations } from 'drizzle-orm';
+import { dataset } from './dataset';
+import { dataset_utterance } from './utterance';
+
+// Define the dataset table schema
+export const dataset_entry = sqliteTable('dataset_entry', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  externalId: text('external_id').notNull(),
+  speakerId: text('speaker_id').notNull(),
+  modelName: text('model_name').notNull(),
+  datasetId: integer('dataset_id')
+    .notNull()
+    .references(() => dataset.id),
+  utteranceId: text('utterance_id').references(() => dataset_utterance.id),
+  fileName: text('file_name').notNull(),
+  dialect: text('dialect').notNull(),
+  iteration: integer('iteration').notNull(),
+  createdAt: integer('created_at', { mode: 'timestamp' })
+    .notNull()
+    .default(new Date()),
+  updatedAt: integer('updated_at', { mode: 'timestamp' })
+    .notNull()
+    .default(new Date())
+});
+
+export const dataset_entryRelations = relations(dataset_entry, ({ one }) => ({
+  dataset: one(dataset, {
+    fields: [dataset_entry.datasetId],
+    references: [dataset.id]
+  }),
+  utterance: one(dataset_utterance, {
+    fields: [dataset_entry.utteranceId],
+    references: [dataset_utterance.id]
+  })
+}));
+
+// Create a type for dataset records based on the schema
+export type DatasetEntry = typeof dataset_entry.$inferSelect;
+export type NewDatasetEntry = typeof dataset_entry.$inferInsert;

src/lib/model/index.ts

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+export * from "./dataset";
+export * from "./dataset_entry";
+export * from "./utterance";

src/lib/model/utterance.ts

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+import { sqliteTable, text, integer } from 'drizzle-orm/sqlite-core';
+import { relations } from 'drizzle-orm';
+import { dataset } from './dataset';
+
+// Define the dataset_utterance table schema
+export const dataset_utterance = sqliteTable('dataset_utterance', {
+  id: text('id').primaryKey(),
+  datasetId: integer('dataset_id')
+    .notNull()
+    .references(() => dataset.id),
+  text: text('text').notNull(),
+  createdAt: integer('created_at', { mode: 'timestamp' })
+    .notNull()
+    .default(new Date()),
+  updatedAt: integer('updated_at', { mode: 'timestamp' })
+    .notNull()
+    .default(new Date()),
+});
+
+export const dataset_utteranceRelations = relations(dataset_utterance, ({ one }) => ({
+  dataset: one(dataset, {
+    fields: [dataset_utterance.datasetId],
+    references: [dataset.id],
+  }),
+}));
+
+// Create types for dataset_utterance records based on the schema
+export type DatasetUtterance = typeof dataset_utterance.$inferSelect;
+export type NewDatasetUtterance = typeof dataset_utterance.$inferInsert;