The greedy `.*` captures with `re.DOTALL` cause `findall()` to merge
multiple tool calls into a single match — silently dropping all but the
last tool call. Switching to `.*?` (non-greedy) fixes extraction when
models return multiple tool calls in one response.
Adds test coverage for the DeepSeek V3 parser including a multi-tool
call regression test.
Co-authored-by: Himess <semihcvlk53@gmail.com>
- environments/__init__.py: try/except on atroposlib imports so
submodules like tool_call_parsers remain importable standalone
- test_agent_loop.py, test_tool_call_parsers.py,
test_managed_server_tool_support.py: skip at module level when
atroposlib is missing
