Fix sslsni boolean to integer conversion for libpq compatibility

The sslsni connection parameter was being stored as a boolean (true/false)
in the database, but libpq expects integer values (1/0) for this parameter.
When a boolean value was passed to libpq, it resulted in SSL connection
failures with 'unexpected eof while reading' errors.

This fix converts boolean connection parameters (sslcompression, sslsni) to
integers when creating the connection string in server_manager.py, ensuring
libpq receives the expected integer format.

Fixes connection issues when using PGSSLSNI=1 with PostgreSQL 14+ servers.

Author: jhf

web/pgadmin/utils/driver/psycopg3/server_manager.py

@@ -690,6 +690,10 @@ def create_connection_string(self, database, user, password=None):
                 if key == 'hostaddr' and self.use_ssh_tunnel:
                     continue
 
+                # Convert boolean connection parameters to integer for libpq compatibility
+                if key in ('sslcompression', 'sslsni'):
+                    value = 1 if value else 0
+
                 dsn_args[key] = value
                 display_dsn_args[key] = orig_value if with_complete_path else \
                     value