feat: use websocket for client server communication (previously enabled by EXPERIMENTAL_WS_API)

[PierreJeanjacquot]

This PR switches the communication protocol to the previously experimental websocket API

[github-actions]

🐳 Hadolint Dockerfile Lint Results

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api/Dockerfile:4 DL3018 warning: Pin versions in apk add. Instead of `apk add <package>` use `apk add <package>=<version>`

[Copilot]

Pull Request Overview

This PR switches from the experimental websocket API (previously enabled by EXPERIMENTAL_WS_API flag) to making it the default communication protocol, removing the HTTP-based fallback entirely. The change simplifies the client-server communication by using websockets exclusively.

Key changes:

• Removed the EXPERIMENTAL_WS_API feature flag and websocket conditional logic
• Deprecated HTTP endpoints and handlers in favor of websocket communication
• Added deprecation warnings for old features including HTTP endpoints, legacy templates, and scone versions

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
cli/src/utils/sconify.ts	Removed HTTP fallback logic, now uses websockets exclusively
cli/src/utils/featureFlags.ts	Removed useWsApi feature flag
cli/src/config/config.ts	Removed HTTP API URL constant
api/src/sconify/sconifyBuild.handler.ts	Renamed HTTP handler to deprecated, added deprecation warnings
api/src/sconify/deprecated_sconify.handler.ts	Added deprecation warnings to legacy handlers
api/src/index.ts	Updated to use deprecated HTTP handler
api/src/constants/constants.ts	Updated comments to mark legacy features as deprecated
api/README.md	Updated documentation to reflect websocket-first API design

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