teensy 4.1 parameter server limits to 5 parameters

Nobody has claimed this yet.

I have a working implementation of the parameter server with 4 parameters, and I was trying to add two more. However, when I try with 6 parameters, the client goes into the RCCHECK error loop. I removed one of them and tried with 5 parameters, and it works as expected.

This is my parameter server config:

```
rclc_parameter_options_t param_options = {
.notify_changed_over_dds = true,
.max_params = 6,
.allow_undeclared_parameters = false,
.low_mem_mode = true};
```

I tried increasing max_params to 10 (while only adding 6 parameters), tried with low_mem_mode = false, but none of these combinations work for more than 5 parameters. Works as expected with 5 or fewer than 5.

Is this limit of 5 hardcoded anywhere? How do I work with more than 5 parameters? Eventually I want to add a few more, up to 10 parameters.

- Hardware description: Teensy 4.1
- RTOS: -
- Installation type: micro_ros_agent (using micro_ros_setup)
- Version or commit hash:humble

#### Steps to reproduce the issue

#### Expected behavior
micro-ros-agent connects to the device, all entities are successfully created, and I can set/get all the parameters

#### Actual behavior
micro-ros-agent tries to connect to the device, the client goes into the RCCHECK error loop while trying to create the parameter server, while adding parameters to the server or while setting the default values. This is only observed when number of parameters is > 5.

#### Additional information

Reproduce the issue with the provided rclc_parameter_options_t configuration on a Teensy 4.1 using micro_ros_arduino and the micro-ROS agent. Trace the RCCHECK failure during parameter-server creation, parameter addition, or default-value setting; done when the parameter server reliably handles more than five parameters.

Written by the indexing model from the issue text.