fix(python): SubscriptionTransportMedium lives in QuantConnect, not QC.Data (v0.1.3)

v0.1.2 fixed half the original bug — moved SubscriptionDataSource to its
correct namespace QuantConnect.Data. But SubscriptionTransportMedium is
in QuantConnect (the parent), not QC.Data. Same silent-no-trades failure
mode as v0.1.1.

Caught by re-running gamma-scalping Tier 2 smoke after the v0.1.2 bump in
flashalpha-historical-examples. LEAN log:
  cannot import name 'SubscriptionTransportMedium' from 'QuantConnect.Data'
  File "/root/.local/lib/python3.11/site-packages/flashalpha_quantconnect/data/source.py", line 53

The fix splits the import:
  from QuantConnect import SubscriptionTransportMedium
  from QuantConnect.Data import SubscriptionDataSource, FileFormat

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: tdobrowolski1

CHANGELOG.md

@@ -38,7 +38,8 @@ Initial public release. The bridge ships with full coverage of the FlashAlpha hi
 - **Documentation corpus.** Repo-root `README.md` with side-by-side C# + Python examples, `docs/getting-started.md`, `docs/data-types.md` (per-bar field reference for all 17 endpoints), `docs/auth.md`, `docs/troubleshooting.md`, and five `docs/recipes/*.md` cookbooks.
 - **`llms.txt`** site map per [llmstxt.org](https://llmstxt.org/).
 
-[Unreleased]: https://github.com/FlashAlpha-lab/flashalpha-quantconnect/compare/v0.1.2...HEAD
+[Unreleased]: https://github.com/FlashAlpha-lab/flashalpha-quantconnect/compare/v0.1.3...HEAD
+[0.1.3]: https://github.com/FlashAlpha-lab/flashalpha-quantconnect/compare/v0.1.2...v0.1.3
 [0.1.2]: https://github.com/FlashAlpha-lab/flashalpha-quantconnect/compare/v0.1.1...v0.1.2
 [0.1.1]: https://github.com/FlashAlpha-lab/flashalpha-quantconnect/compare/v0.1.0...v0.1.1
 [0.1.0]: https://github.com/FlashAlpha-lab/flashalpha-quantconnect/releases/tag/v0.1.0

src/csharp/FlashAlpha.QuantConnect/FlashAlpha.QuantConnect.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <PackageId>FlashAlpha.QuantConnect</PackageId>
     <RootNamespace>FlashAlpha.QuantConnect</RootNamespace>
-    <Version>0.1.2</Version>
+    <Version>0.1.3</Version>
     <Authors>FlashAlpha</Authors>
     <Company>FlashAlpha</Company>
     <Copyright>Copyright (c) 2026 FlashAlpha</Copyright>

src/python/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "flashalpha-quantconnect"
-version = "0.1.2"
+version = "0.1.3"
 description = "FlashAlpha options-flow and dealer-positioning data as QuantConnect LEAN custom-data bars. GEX, DEX, VEX, vol surface, 0DTE, VRP, max-pain."
 readme = "README.md"
 license = "MIT"

src/python/src/flashalpha_quantconnect/__init__.py

@@ -1,6 +1,6 @@
 """FlashAlpha options-flow data as QuantConnect LEAN custom-data bars."""
 
-__version__ = "0.1.2"
+__version__ = "0.1.3"
 
 from . import config
 from .data.exposure import (

src/python/src/flashalpha_quantconnect/data/source.py

@@ -50,7 +50,8 @@ def source_for(endpoint: str, symbol: Any, date: datetime) -> Any:
     """Eagerly fetch the JSON for (endpoint, ticker, date), cache it, return
     a sentinel ``SubscriptionDataSource`` that ``parse`` will resolve via
     the cache key."""
-    from QuantConnect.Data import SubscriptionDataSource, SubscriptionTransportMedium, FileFormat
+    from QuantConnect import SubscriptionTransportMedium
+    from QuantConnect.Data import SubscriptionDataSource, FileFormat
 
     ticker = symbol.Value
     key = _make_key(endpoint, ticker, date)