feature: Schema, Migrations, Core CRUD, and Redis Threshold Cache

2026-06-16 17:59:16 +08:00
commit 882d4af3e6
63 changed files with 3923 additions and 0 deletions
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+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+public class PatientConfiguration : IEntityTypeConfiguration<Patient>
+{
+    public void Configure(EntityTypeBuilder<Patient> builder)
+    {
+        builder.ToTable("patients");
+        builder.HasKey(p => p.Id);
+        builder.Property(p => p.Id).HasColumnName("id").HasDefaultValueSql("gen_random_uuid()");
+        builder.Property(p => p.Mrn).HasColumnName("mrn").HasMaxLength(20).IsRequired();
+        builder.Property(p => p.FirstName).HasColumnName("first_name").HasMaxLength(100).IsRequired();
+        builder.Property(p => p.LastName).HasColumnName("last_name").HasMaxLength(100).IsRequired();
+        builder.Property(p => p.DateOfBirth).HasColumnName("date_of_birth");
+        builder.Property(p => p.Gender).HasColumnName("gender").HasMaxLength(10).IsRequired();
+        builder.Property(p => p.Status).HasColumnName("status").HasMaxLength(20).HasDefaultValue("active");
+        builder.Property(p => p.CreatedAt).HasColumnName("created_at").HasDefaultValueSql("NOW()");
+
+        // MRN uses exact-match unique index — MRN lookups are always equality checks,
+        // never LIKE/ILIKE. A B-tree unique index satisfies O(log n) point lookup.
+        // Name search uses ILIKE on first_name/last_name — a prefix scan, not an
+        // equality match — so no index here; full ILIKE is intentionally unindexed
+        // at this scale (pg_trgm GIN would be warranted at >500k patients).
+        builder.HasIndex(p => p.Mrn).IsUnique();
+    }
+}