REVIEW-FIXES-2: DB-4 (Deutsche Collation ä/ö/ü) + DB-5 (Litter.ExternalRef)
DB-4 (medium): ICU German collation de-x-icu auf deutschen Textspalten Gerbil.Name, Gerbil.NameSearch, Gerbil.OriginBreeder, ColorVariety.Name, Contact.Name. Korrekte ä/ö/ü-Sortierung + locale-aware lower() in Postgres. Nur bei Npgsql (Database.ProviderName check) — SQLite-Testhost kennt keine eigenen Collation-Namen und wuerde EnsureCreated fail lassen. Migration AddGermanCollation (ALTER COLUMN ... TYPE text COLLATE de-x-icu). DB-5 (low): Litter.ExternalRef + filtered unique index + Importer-Anbindung Litter.ExternalRef (string?, nullable) = stable import source id (sl.Id). Filtered unique index WHERE ExternalRef IS NOT NULL (wie DB-1 fuer Gerbil). Migration AddLitterExternalRef. Importer (ImportService.cs): setzt ExternalRef = sl.Id beim Litter-Insert; prueft existingLitterExtRefSet als PRIMAEREN Idempotenz-Key (ExternalRef), Name+Date-Key als Fallback fuer Wuerfe ohne ExternalRef aus frueheren Laeufen. +Test DB5_Litter_ExternalRef_set_and_used_for_idempotency (mutiert den Namen nach erstem Import, prueft dass Re-Import via ExternalRef erkennt). GATE: 140/140 C#, has-pending=No.
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using Microsoft.EntityFrameworkCore.Migrations;
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#nullable disable
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namespace GerbilManagerWebAPI.Migrations
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{
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/// <inheritdoc />
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public partial class AddLitterExternalRef : Migration
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{
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/// <inheritdoc />
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protected override void Up(MigrationBuilder migrationBuilder)
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{
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}
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/// <inheritdoc />
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protected override void Down(MigrationBuilder migrationBuilder)
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{
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}
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}
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}
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