Narrow DriverManager fallback rescue to no-suitable-driver errors

The bare rescue on java.sql.DriverManager.getConnection swallowed any
exception, including argument errors and unrelated SQL failures, and
then tried the ORACLE_DRIVER fallback, obscuring the real error.

Catch only Java::JavaSql::SQLException with a "no suitable driver"
message (the one case the fallback was added for) and re-raise
everything else so the original error surfaces.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

lib/plsql/jdbc_connection.rb

@@ -54,7 +54,8 @@ def self.create_raw(params)
       url = jdbc_connection_url(params)
       conn = begin
         java.sql.DriverManager.getConnection(url, params[:username], params[:password])
-      rescue
+      rescue Java::JavaSql::SQLException => e
+        raise unless e.message =~ /no suitable driver/i
         # bypass DriverManager to work in cases where ojdbc*.jar
         # is added to the load path at runtime and not on the
         # system classpath

spec/spec_helper.rb

@@ -90,7 +90,8 @@ def get_connection(user_number = 0)
     try_to_connect(Java::JavaSql::SQLException) do
       begin
         java.sql.DriverManager.getConnection(get_connection_url, database_user, database_password)
-      rescue Java::JavaSql::SQLException
+      rescue Java::JavaSql::SQLException => e
+        raise unless e.message =~ /no suitable driver/i
         # bypass DriverManager to work in cases where ojdbc*.jar
         # is added to the load path at runtime and not on the
         # system classpath