Add noise generation service

[lakshay6666]

Summary

Adds noise-generation-service, a new Python FastAPI service for deterministic procedural noise generation and contour-style SVG output. The service is intended for generating random contour-plot style practice data for geostatistical interpolation exercises.

The implementation uses pyfastnoiselite, a Python wrapper around FastNoiseLite, and exposes the functionality through both a REST API and a matching CLI.

What changed

• Added services/noise-generation-service
• Added FastAPI REST endpoints:
  • GET /health
  • POST /noise/grid
  • POST /noise/contour.svg
• Added generated OpenAPI spec:
  • noise-generation-service.openapi.json
• Added CLI commands:
  • noise-generation grid
  • noise-generation contour
• Added Dockerfile for image-based distribution
• Added service Makefile with repository-style targets
• Added GitHub Actions CI workflow
• Added README documentation including usage and minimal hardware requirements
• Registered the service in the root README service table

Validation

Tested locally with:

• make lint
• make test
• make generate-openapi

Test result:

• 12 passed
• 100% coverage

Also verified the Dockerized service locally on http://127.0.0.1:8001 using /health and /noise/grid.

Notes

The task mentioned libnoise and fastnoise as possible candidates. This implementation uses pyfastnoiselite, which satisfies the FastNoise candidate path while avoiding a custom in-house noise implementation.