Initial commit: standalone quiz-testing system

Full-stack F# (Domain/Server/Client via Fable+Elmish+Feliz), PostgreSQL
persistence via Dapper, Docker Compose deployment. Student quiz-taking flow
with time-limit enforcement and focus-loss tracking, Teacher question bank
and quiz builder with results analytics, Admin user management.

src/Domain/Features/GetMyAttempts.fs

@@ -0,0 +1,15 @@
+namespace Domain.Contracts
+
+open System
+open Domain
+
+/// One of the student's own past attempts at a quiz — only graded attempts
+/// are ever returned (an abandoned in-progress attempt has nothing to show).
+type MyAttemptSummary =
+    { AttemptId: AttemptId
+      StartedAt: DateTimeOffset
+      Score: float
+      MaxScore: float
+      Passed: bool option }
+
+type GetMyAttemptsRequest = { QuizId: QuizId }