MOD: Upgrade databento_dbn to version 0.56.0

Author: nmacholl

CHANGELOG.md

@@ -5,6 +5,9 @@
 #### Enhancements
 - Added new publisher values for Cboe Titanium Cboe Global Indices Feed
 - Added `YEAR` to `SplitDuration` enum to support yearly historical batch job submission
+- Upgraded `databento-dbn` to 0.56.0:
+  - Improved Python `DBNDecoder.decode()` performance with pre-allocated output buffers
+  - Added `DBNDecoder.write_and_decode()` to combine write and decode in a single call
 
 ## 0.76.0 - 2026-04-21
 

README.md

@@ -32,7 +32,7 @@ The library is fully compatible with distributions of Anaconda 2023.x and above.
 The minimum dependencies as found in the `pyproject.toml` are also listed below:
 - python = "^3.10"
 - aiohttp = "^3.8.3"
-- databento-dbn = "~0.55.0"
+- databento-dbn = "~0.56.0"
 - numpy = ">=1.23.5"
 - pandas = ">=1.5.3"
 - pip-system-certs = ">=4.0" (Windows only)

pyproject.toml

@@ -10,7 +10,7 @@ dynamic = [ "classifiers" ]
 dependencies = [
     "aiohttp>=3.8.3,<4.0.0; python_version < '3.12'",
     "aiohttp>=3.9.0,<4.0.0; python_version >= '3.12'",
-    "databento-dbn~=0.55.0",
+    "databento-dbn~=0.56.0",
     "numpy>=1.23.5; python_version < '3.12'",
     "numpy>=1.26.0; python_version >= '3.12'",
     "pandas>=1.5.3,<4.0.0",