feat: add Railway-ready Jyotish chat product

tests/test_api_server_script_entrypoint.py

@@ -0,0 +1,37 @@
+"""Regression coverage for starting the API server as a script."""
+
+from __future__ import annotations
+
+import subprocess
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+API_SERVER = ROOT / "scripts" / "jyotish_api_server.py"
+
+
+def test_script_entrypoint_can_lazy_import_scripts_package_from_another_cwd() -> None:
+    """The documented script command must retain repository-root package imports."""
+    program = f"""
+import runpy
+import sys
+from pathlib import Path
+
+root = Path({str(ROOT)!r})
+sys.path[:] = [entry for entry in sys.path if Path(entry or '.').resolve() != root]
+namespace = runpy.run_path({str(API_SERVER)!r}, run_name='jyotish_api_server_script_entrypoint')
+handler = namespace['JyotishAPIHandler'].__new__(namespace['JyotishAPIHandler'])
+result = handler._compute_vedastro_gateway_archives()
+assert isinstance(result, dict)
+"""
+    completed = subprocess.run(
+        [sys.executable, "-c", program],
+        cwd="/tmp",
+        capture_output=True,
+        text=True,
+        check=False,
+        timeout=20,
+    )
+
+    assert completed.returncode == 0, completed.stderr