feat: prepare EvoScientist 0.3.0

Add bounded document ingestion, controlled web search, recoverable session support, subagent timeouts, and the native sandbox runtime contract. Unify package versioning and add release-focused regression coverage.

EvoScientist/__init__.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 from importlib import import_module
 
-__version__ = "0.2.2"
+from ._version import __version__
 
 _EXPORTS: dict[str, tuple[str, str]] = {
     # Agent graph (lazy to avoid expensive initialization at import time)
@@ -73,4 +73,5 @@ def __dir__() -> list[str]:
     return sorted(set(globals()) | set(_EXPORTS))
 
 
-__all__ = list(_EXPORTS)
+__all__ = ["__version__"]
+__all__.extend(_EXPORTS)