chore(db): migrate from SQLite to PostgreSQL

- Change Prisma provider from sqlite to postgresql
- Replace better-sqlite3 adapter with @prisma/adapter-pg
- Update prisma.config.ts and lib/prisma.ts for PostgreSQL
- Add DATABASE_URL to .env.local
- Regenerate Prisma client for PostgreSQL
- Recreate migrations for PostgreSQL database

lib/generated/prisma/internal/prismaNamespace.ts

@@ -733,6 +733,9 @@ export type TypeMap<ExtArgs extends runtime.Types.Extensions.InternalArgs = runt
  */
 
 export const TransactionIsolationLevel = runtime.makeStrictEnum({
+  ReadUncommitted: 'ReadUncommitted',
+  ReadCommitted: 'ReadCommitted',
+  RepeatableRead: 'RepeatableRead',
   Serializable: 'Serializable'
 } as const)
 
@@ -799,6 +802,14 @@ export const SortOrder = {
 export type SortOrder = (typeof SortOrder)[keyof typeof SortOrder]
 
 
+export const QueryMode = {
+  default: 'default',
+  insensitive: 'insensitive'
+} as const
+
+export type QueryMode = (typeof QueryMode)[keyof typeof QueryMode]
+
+
 
 /**
  * Field references
@@ -812,6 +823,13 @@ export type StringFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel,
     
 
 
+/**
+ * Reference to a field of type 'String[]'
+ */
+export type ListStringFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel, 'String[]'>
+    
+
+
 /**
  * Reference to a field of type 'Boolean'
  */
@@ -826,6 +844,13 @@ export type DateTimeFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel
     
 
 
+/**
+ * Reference to a field of type 'DateTime[]'
+ */
+export type ListDateTimeFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel, 'DateTime[]'>
+    
+
+
 /**
  * Reference to a field of type 'Int'
  */
@@ -833,12 +858,26 @@ export type IntFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel, 'In
     
 
 
+/**
+ * Reference to a field of type 'Int[]'
+ */
+export type ListIntFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel, 'Int[]'>
+    
+
+
 /**
  * Reference to a field of type 'Float'
  */
 export type FloatFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel, 'Float'>
     
 
+
+/**
+ * Reference to a field of type 'Float[]'
+ */
+export type ListFloatFieldRefInput<$PrismaModel> = FieldRefInputType<$PrismaModel, 'Float[]'>
+    
+
 /**
  * Batch Payload for updateMany & deleteMany & createMany
  */