Add GitHub integration service and endpoints

Data/Engine/interfaces/http/github.py

@@ -0,0 +1,60 @@
+"""GitHub-related HTTP endpoints."""
+
+from __future__ import annotations
+
+from flask import Blueprint, Flask, current_app, jsonify, request
+
+from Data.Engine.services.container import EngineServiceContainer
+
+blueprint = Blueprint("engine_github", __name__)
+
+
+def register(app: Flask, _services: EngineServiceContainer) -> None:
+    if "engine_github" not in app.blueprints:
+        app.register_blueprint(blueprint)
+
+
+@blueprint.route("/api/repo/current_hash", methods=["GET"])
+def repo_current_hash() -> object:
+    services: EngineServiceContainer = current_app.extensions["engine_services"]
+    github = services.github_service
+
+    repo = (request.args.get("repo") or "").strip() or None
+    branch = (request.args.get("branch") or "").strip() or None
+    refresh_flag = (request.args.get("refresh") or "").strip().lower()
+    ttl_raw = request.args.get("ttl")
+    try:
+        ttl = int(ttl_raw) if ttl_raw else github.default_refresh_interval
+    except ValueError:
+        ttl = github.default_refresh_interval
+    force_refresh = refresh_flag in {"1", "true", "yes", "force", "refresh"}
+
+    snapshot = github.get_repo_head(repo, branch, ttl_seconds=ttl, force_refresh=force_refresh)
+    payload = snapshot.to_dict()
+    if not snapshot.sha:
+        return jsonify(payload), 503
+    return jsonify(payload)
+
+
+@blueprint.route("/api/github/token", methods=["GET", "POST"])
+def github_token() -> object:
+    services: EngineServiceContainer = current_app.extensions["engine_services"]
+    github = services.github_service
+
+    if request.method == "GET":
+        payload = github.get_token_status(force_refresh=True).to_dict()
+        return jsonify(payload)
+
+    data = request.get_json(silent=True) or {}
+    token = data.get("token")
+    normalized = str(token).strip() if token is not None else ""
+    try:
+        payload = github.update_token(normalized).to_dict()
+    except Exception as exc:  # pragma: no cover - defensive logging
+        current_app.logger.exception("failed to store GitHub token: %s", exc)
+        return jsonify({"error": f"Failed to store token: {exc}"}), 500
+    return jsonify(payload)
+
+
+__all__ = ["register", "blueprint", "repo_current_hash", "github_token"]
+