Adds in Mantis features. Enabling automated downloading of Mantises into the internal database, browsing of them, and viewing of attachments (including .msg files).

Resolves #14

prisma/schema.prisma

@@ -137,3 +137,44 @@ model Log {
   message   String
   meta      Json?    // Optional field for additional structured data
 }
+
+// --- Mantis Models Start ---
+
+model MantisIssue {
+  id          Int             @id @default(autoincrement())
+  title       String
+  description String?
+  reporterUsername String?      @map("reporter_username")
+  status      String
+  priority    String
+  severity    String
+  createdAt   DateTime        @default(now()) @map("created_at")
+  updatedAt   DateTime        @updatedAt @map("updated_at")
+
+  comments    MantisComment[]
+}
+
+model MantisComment {
+  id            Int                @id @default(autoincrement())
+  mantisIssueId Int                @map("mantis_issue_id")
+  senderUsername String?           @map("sender_username")
+  comment       String
+  createdAt     DateTime           @default(now()) @map("created_at")
+
+  mantisIssue   MantisIssue        @relation(fields: [mantisIssueId], references: [id], onDelete: Cascade)
+  attachments   MantisAttachment[]
+}
+
+model MantisAttachment {
+  id         Int           @id @default(autoincrement())
+  commentId  Int           @map("comment_id")
+  filename   String
+  url        String // Store path or URL to the file
+  mimeType   String?       @map("mime_type")
+  size       Int?
+  uploadedAt DateTime      @default(now()) @map("uploaded_at")
+
+  comment    MantisComment @relation(fields: [commentId], references: [id], onDelete: Cascade)
+}
+
+// --- Mantis Models End ---