Added gitea-mirror

Divers/gitea-mirror/drizzle/0005_polite_preak.sql

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+-- Step 1: Remove duplicate repositories, keeping the most recently updated one
+-- This handles cases where users have duplicate entries from before the unique constraint
+DELETE FROM repositories
+WHERE rowid NOT IN (
+  SELECT MAX(rowid)
+  FROM repositories
+  GROUP BY user_id, full_name
+);
+--> statement-breakpoint
+-- Step 2: Now create the unique index safely
+CREATE UNIQUE INDEX uniq_repositories_user_full_name ON repositories (user_id, full_name);