Bump ddtrace from 3.2.3 to 3.18.1

Bumps [ddtrace](https://github.com/DataDog/dd-trace-py) from 3.2.3 to 3.18.1.
- [Release notes](https://github.com/DataDog/dd-trace-py/releases)
- [Changelog](https://github.com/DataDog/dd-trace-py/blob/main/CHANGELOG.md)
- [Commits](DataDog/dd-trace-py@v3.2.3...v3.18.1)

---
updated-dependencies:
- dependency-name: ddtrace
  dependency-version: 3.18.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.in

@@ -2,7 +2,7 @@ alembic~=1.15.1
 astroid~=3.3.9
 blinker~=1.4
 csh_ldap>=2.3.1
-ddtrace~=3.2.1
+ddtrace~=3.18.1
 Flask~=3.1.0
 Flask-Migrate~=2.1.1
 Flask-Gzip~=0.2

requirements.txt

@@ -36,7 +36,7 @@ cryptography==46.0.3
     # via oic
 csh-ldap==2.4.0
     # via -r requirements.in
-ddtrace==3.2.3
+ddtrace==3.18.1
     # via -r requirements.in
 defusedxml==0.7.1
     # via oic
@@ -188,7 +188,6 @@ tomlkit==0.13.3
 typing-extensions==4.15.0
     # via
     #   alembic
-    #   ddtrace
     #   opentelemetry-api
     #   pydantic
     #   pydantic-core
@@ -212,7 +211,5 @@ wrapt==1.17.3
     # via
     #   -r requirements.in
     #   ddtrace
-xmltodict==1.0.2
-    # via ddtrace
 zipp==3.23.0
     # via importlib-metadata