REQ_01_01: Missing 'shall' in 4 communication feature requirements

[antonkri]

Finding from Requirements Inspection (REQ_01_01)

The following feat_req do not use "shall" in their requirement body text, violating the requirement sentence template:

• feat_req__com__interfaces
• feat_req__com__event_type
• feat_req__com__signal
• feat_req__com__service_instance_names

File: docs/features/communication/docs/requirements/index.rst

Acceptance Criteria

All requirement bodies must contain at least one "shall" statement.