feat: implement blood glucose tracking form and API with MariaDB database support

prisma/schema.prisma

@@ -4,7 +4,7 @@ generator client {
 }
 
 datasource db {
-  provider = "sqlite"
+  provider = "mysql"
 }
 
 // ─── Auth ────────────────────────────────────────────────────────────────────
@@ -45,7 +45,7 @@ model Reading {
   measuredAt DateTime
   moment     String
   value      Float
-  notes      String?
+  notes      String?  @db.Text
   createdAt  DateTime @default(now())
 
   @@index([userId, measuredAt])
@@ -71,7 +71,7 @@ model DailyAnalysis {
   id          String   @id @default(cuid())
   userId      String   @unique
   user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
-  content     String
+  content     String   @db.Text
   generatedAt DateTime @default(now())
 }