fix(webauthn): use Length.LONG32 for byte[] columns to fix MariaDB row size limit (#286)

VARBINARY(65535) columns exceed MariaDB's InnoDB 65,535-byte row size
limit, causing silent table creation failure with ddl-auto: update.

Length.LONG32 causes Hibernate to auto-upgrade to LONGBLOB on MariaDB
(stored off-page) and stays as bytea on PostgreSQL (no OID issues).
Avoids @lob which maps to OID on PostgreSQL per Hibernate docs.

Author: devondragon

src/main/java/com/digitalsanctuary/spring/user/persistence/model/WebAuthnCredential.java

@@ -1,6 +1,7 @@
 package com.digitalsanctuary.spring.user.persistence.model;
 
 import java.time.Instant;
+import org.hibernate.Length;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
@@ -30,7 +31,7 @@ public class WebAuthnCredential {
 	private WebAuthnUserEntity userEntity;
 
 	/** COSE-encoded public key (typically 77-300 bytes, RSA keys can be larger). */
-	@Column(name = "public_key", nullable = false, length = 2048)
+	@Column(name = "public_key", nullable = false, length = Length.LONG32)
 	private byte[] publicKey;
 
 	/** Counter to detect cloned authenticators. */
@@ -58,11 +59,11 @@ public class WebAuthnCredential {
 	private boolean backupState;
 
 	/** Attestation data from registration (can be several KB). */
-	@Column(name = "attestation_object", length = 65535)
+	@Column(name = "attestation_object", length = Length.LONG32)
 	private byte[] attestationObject;
 
 	/** Client data JSON from registration (can be several KB). */
-	@Column(name = "attestation_client_data_json", length = 65535)
+	@Column(name = "attestation_client_data_json", length = Length.LONG32)
 	private byte[] attestationClientDataJson;
 
 	/** Creation timestamp. */