Bump ddtrace from 3.2.3 to 4.0.0

Bumps [ddtrace](https://github.com/DataDog/dd-trace-py) from 3.2.3 to 4.0.0.
- [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...v4.0.0)

---
updated-dependencies:
- dependency-name: ddtrace
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

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~=4.0.0
 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==4.0.0
     # via -r requirements.in
 defusedxml==0.7.1
     # via oic
@@ -90,8 +90,6 @@ jinja2==3.1.6
     #   flask
 lazy-object-proxy==1.4.3
     # via -r requirements.in
-legacy-cgi==2.6.3
-    # via ddtrace
 mako==1.0.14
     # via
     #   -r requirements.in
@@ -123,8 +121,6 @@ pip-tools==7.4.1
     # via -r requirements.in
 platformdirs==4.5.0
     # via pylint
-protobuf==6.33.0
-    # via ddtrace
 psycopg2-binary==2.9.11
     # via -r requirements.in
 pyasn1==0.6.1
@@ -188,7 +184,6 @@ tomlkit==0.13.3
 typing-extensions==4.15.0
     # via
     #   alembic
-    #   ddtrace
     #   opentelemetry-api
     #   pydantic
     #   pydantic-core
@@ -212,7 +207,5 @@ wrapt==1.17.3
     # via
     #   -r requirements.in
     #   ddtrace
-xmltodict==1.0.2
-    # via ddtrace
 zipp==3.23.0
     # via importlib-metadata