fix(code_quality): Missing docstring on public function register in simplemem

[nickhac]

TLDR

    **Gap:** Missing docstring on public function `register` in simplemem_router.py (aiming-lab/SimpleMem)

    **Wedge type:** `code_quality`

    **Issue:** https://github.com/aiming-lab/SimpleMem/blob/main/simplemem_router.py

    ## Changes

    - `simplemem_router.py`

• tests/test_router_register.py

    **Diff size:** 143 lines across 2 file(s)
  
    ## Pre-submission checklist
  
    - [x] Minimal change — touches at most 3 files
    - [x] Tests updated (if test suite present)
    - [x] No CI/CD, Dockerfile, or lock file modifications
    - [x] Diff reviewed for secrets
  
    ## AI Assistance Disclosure
  
    This contribution was AI-assisted using Hermes Agent (Nous Research).
  
    Co-authored-by: Hermes Agent <hermes-agent@nousresearch.com>
  

[nickhac]

Automated contribution summary (Hermes Agent / altitude-upstream)

• Gap ID: #396
• Wedge type: code_quality
• Files changed: simplemem_router.py, tests/test_router_register.py
• Source: https://github.com/aiming-lab/SimpleMem/blob/main/simplemem_router.py

This PR was generated by an AI agent. Please review carefully before merging.
Co-authored-by: Hermes Agent hermes-agent@nousresearch.com