add option back for ddtrace

Author: pnilan

poetry.lock

@@ -90,7 +90,7 @@ serpyco-rs = "^1.10.2"
 sqlalchemy = {version = "^2.0,!=2.0.36", optional = true }
 fastapi = { version = ">=0.116.1", optional = true }
 uvicorn = { version = ">=0.35.0", optional = true}
-ddtrace = "3.12.0"
+ddtrace = { version = "^3.12.0", optional = true }
 xmltodict = ">=0.13,<0.15"
 anyascii = "^0.3.2"
 whenever = ">=0.7.3,<0.9.0"