feat!: change records table to store cid as bytes

consumer/src/db/copy.rs

···
     let writer = conn
         .copy_in("COPY records_tmp (at_uri, did, cid) FROM STDIN (FORMAT binary)")
         .await?;
-    let writer = BinaryCopyInWriter::new(writer, &[Type::TEXT, Type::TEXT, Type::TEXT]);
+    let writer = BinaryCopyInWriter::new(writer, &[Type::TEXT, Type::TEXT, Type::BYTEA]);
 
     pin_mut!(writer);
 
     for (at_uri, cid) in data {
         let writer = writer.as_mut();
-        writer.write(&[&at_uri, &did, &cid.to_string()]).await?;
+        writer.write(&[&at_uri, &did, &cid.to_bytes()]).await?;
     }
 
     writer.finish().await?;

consumer/src/db/record.rs

···
 ) -> PgExecResult {
     conn.execute(
         "INSERT INTO records (at_uri, did, cid) VALUES ($1, $2, $3) ON CONFLICT (at_uri) DO UPDATE SET cid=EXCLUDED.cid",
-        &[&at_uri, &repo, &cid.to_string()],
+        &[&at_uri, &repo, &cid.to_bytes()],
     ).await
 }
 

migrations/2025-05-03-103435_records/up.sql

···
 create table records
 (
     at_uri     text      not null primary key,
-    cid        text      not null,
+    cid        bytea     not null,
 
     did        text      not null,
     indexed_at timestamp not null default now()

parakeet-db/src/schema.rs

···
 diesel::table! {
     records (at_uri) {
         at_uri -> Text,
-        cid -> Text,
+        cid -> Bytea,
         did -> Text,
         indexed_at -> Timestamp,
     }