Upgrade NIP-50 search to ranked Postgres FTS

priv/repo/migrations/20260318144941_add_nip50_fts_and_trigram_search.exs

@@ -0,0 +1,27 @@
+defmodule Parrhesia.Repo.Migrations.AddNip50FtsAndTrigramSearch do
+  use Ecto.Migration
+
+  def up do
+    execute("CREATE EXTENSION IF NOT EXISTS pg_trgm")
+
+    execute("""
+    CREATE INDEX events_content_fts_idx
+    ON events
+    USING GIN (to_tsvector('simple', content))
+    WHERE deleted_at IS NULL
+    """)
+
+    execute("""
+    CREATE INDEX events_content_trgm_idx
+    ON events
+    USING GIN (content gin_trgm_ops)
+    WHERE deleted_at IS NULL
+    """)
+  end
+
+  def down do
+    execute("DROP INDEX IF EXISTS events_content_trgm_idx")
+    execute("DROP INDEX IF EXISTS events_content_fts_idx")
+    execute("DROP EXTENSION IF EXISTS pg_trgm")
+  end
+end