feature: MinIO Data Lake Writer (Parquet, Partitioned)

VigilCareClinicalAPI/DataLake/DataLakeOptions.cs

@@ -0,0 +1,17 @@
+public sealed class DataLakeOptions
+{
+    public const string Section = "DataLake";
+
+    // Maximum events buffered before a forced flush. At ~17 obs/sec steady state
+    // this fires approximately once per minute. Set low in tests (3–5) to avoid
+    // waiting for real traffic.
+    public int FlushCount { get; init; } = 1_000;
+
+    // Maximum age of the oldest buffered event before a time-based flush is forced.
+    // Production: 300 seconds (5 minutes). Tests: 10 seconds.
+    public int FlushIntervalSeconds { get; init; } = 300;
+
+    // MinIO bucket. The discharge summary worker from Phase 6 uses the same bucket
+    // under a different prefix — all VigilCare data stays in one bucket.
+    public string BucketName { get; init; } = "vigilcare";
+}