MOD: Upgrade databento-dbn to 0.52.1

Author: nmacholl

CHANGELOG.md

@@ -1,5 +1,21 @@
 # Changelog
 
+## 0.74.1 - TBD
+
+#### Enhancements
+- Upgraded `databento-dbn` to 0.52.1:
+  - Added `__index__` to all int-representable and char-backed Python enums, enabling
+    use with `int()`, `hex()`, and as sequence indices
+  - Fixed memory leak in Python bindings where every record object leaked ~64 bytes
+    due to a `pyo3` 0.28 regression in `#[pyclass(dict)]` deallocation. Downgraded
+    `pyo3` to 0.27.2
+  - Removed unnecessary `dict` from `BidAskPair` and `ConsolidatedBidAskPair` Python
+    classes
+  - Fixed Python type stubs to reflect that `record_size()` is a method, not a property
+  - Fixed Python type stubs for record fields to indicate which fields are writable
+    (e.g. `publisher_id`, `instrument_id`, `price`, `size`) and added `@setter` stubs
+    for enum fields (e.g. `action`, `side`)
+
 ## 0.74.0 - 2026-03-24
 
 #### Enhancements

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 = "~0.52.0"
+- databento-dbn = "~0.52.1"
 - 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~=0.52.0",
+    "databento-dbn~=0.52.1",
     "numpy>=1.23.5; python_version < '3.12'",
     "numpy>=1.26.0; python_version >= '3.12'",
     "pandas>=1.5.3,<4.0.0",