feat: add fetch_recent_history_deals_for_trading_client to stable SDK (#90)

* refactor: collapse repeated tests with pytest.mark.parametrize

Collapse 13 near-identical test methods into 4 parametrized tests
across test_cli.py and test_sdk.py, keeping all 1045 cases passing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat: add fetch_recent_history_deals_for_trading_client to stable SDK

Adds a generic history deal retrieval helper for active trading clients,
a _HistoryDealsClientProtocol describing the minimal required interface,
clarified create_trading_client() docs (returns pdmt5.Mt5DataClient, not
MT5Client), 9 unit tests at 100% coverage, and updated trading.md and
public-contract.md with examples and out-of-scope strategy semantics note.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: narrow Mt5CliClient protocol claim and preserve empty deal DataFrame schema

- _HistoryDealsClientProtocol docstring and fetch_recent_history_deals_for_trading_client
  docstring now explicitly state that Mt5CliClient (mt5_session) exposes
  history_deals() not history_deals_get_as_df() and does not satisfy the protocol;
  the function is for trading-client sessions (pdmt5.Mt5DataClient) only
- Empty DataFrames with columns are now passed through with reset_index rather
  than replaced by a bare pd.DataFrame(), preserving schema for callers that rely
  on stable column names even in no-deal windows
- Tests updated to assert schema preservation on empty results and bare empty on None

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: add combined protocol so create_trading_client() is type-safe with history deals helper

Adds _TradingHistoryDealsClientProtocol combining _Mt5ClientProtocol and
_HistoryDealsClientProtocol, and updates create_trading_client() and
mt5_trading_session() to return/yield this combined type so the natural SDK
flow `client = create_trading_client(...); fetch_recent_history_deals_for_trading_client(client)`
is type-safe under pyright strict without casts.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: validate hours is finite before timedelta in fetch_recent_history_deals_for_trading_client

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Bump version to 1.1.1

---------

Co-authored-by: agent <agent@localhost>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "mt5cli"
-version = "1.1.0"
+version = "1.1.1"
 description = "Generic MT5 data and execution infrastructure for Python applications"
 authors = [{name = "dceoy", email = "dceoy@users.noreply.github.com"}]
 maintainers = [{name = "dceoy", email = "dceoy@users.noreply.github.com"}]