214 create flask api tests that validate endpoint functions

[JavierGOrdonnez]

This PR includes:

• Complete refactoring of FlaskAPI backend into separate functional modules
• Comprehensive testing

close #214

Once this PR is merged, should automatically close or make easier to address:

• Add some logic to handle function API permission denied error #204 (where is the test for that?)
• Grid sampling return errors #212

[Copilot]

Pull Request Overview

This PR implements a comprehensive refactoring of the Flask API backend into separate functional modules with extensive testing coverage. The main changes organize the codebase into a blueprint-based architecture with dedicated modules for deployment, OSPARC integration, text file operations, sampling operations, and Dakota algorithms. Tests validate endpoint functionality, error handling, and integration points across all modules.

Key Changes:

• Complete Flask API refactoring into blueprint-based modular architecture
• Comprehensive test suite covering all major endpoints and error scenarios
• Addition of Pydantic-based request validation for sampling endpoints

Reviewed Changes

Copilot reviewed 67 out of 74 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
node/src/utils/sampling_utils.ts	Updates sampling endpoint URL paths to use new /sampling/ prefix
node/src/utils/function_utils.ts	Updates OSPARC and deployment endpoint URLs to use new prefixes
node/src/components/sampling/*.tsx	Updates sampling component endpoint URLs to new paths
node/src/components/plots/*.tsx	Updates Dakota plot endpoint URLs to new /dakota/ prefix
node/package.json	Adds vitest coverage package dependency
flaskapi/tests/*.py	Adds comprehensive test suites for all Flask modules
flaskapi/src/mmux_flaskapi/blueprints/*.py	New modular blueprint architecture for Flask app
flaskapi/src/mmux_flaskapi/utils/*.py	New utility modules for configuration and helpers
flaskapi/pyproject.toml	New Python project configuration with pytest setup
flaskapi/main.py	New application entry point
flaskapi/Dockerfile	Updates to use new Makefile-based dependency installation
docker-compose-local.yml	Removes deprecated version field

Files not reviewed (1)

• node/package-lock.json: Language not supported

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