Bump pypdf 6.21.4, certifi 2026.10.23, pyasn1 0.6.5 for pip-audit findings

Co-Authored-By: Claude Opus 5.5 <[email protected]>

server/requirements.txt

@@ -15,7 +15,7 @@ argon2-cffi==25.1.0
 apscheduler==3.11.3
 httpx==0.28.1
 tzdata==2026.5
-pypdf==6.21.2
+pypdf==6.21.4
 python-multipart==0.0.32
 pypdfium2==5.14.0
 openpyxl==3.1.5
@@ -31,7 +31,7 @@ annotated-doc==0.0.5
 annotated-types==0.8.0
 anyio==4.15.1
 argon2-cffi-bindings==26.1.0
-certifi==2026.10.19
+certifi==2026.10.23
 cffi==2.1.1
 charset-normalizer==3.5.2
 click==8.5.0
@@ -50,7 +50,7 @@ more-itertools==11.2.1
 opentelemetry-api==1.45.1
 psycopg-binary==3.3.6
 psycopg-pool==3.3.3
-pyasn1==0.6.4
+pyasn1==0.6.5
 pycparser==3.11
 pydantic-core==2.50.1
 python-dotenv==1.2.4