Revert/dep change (#1323)

* Revert "chore(deps): update dependency paramiko to v5 (#1316)"

This reverts commit cf2c6d7.

* Revert "chore (deps): fix deps (#1311)"

This reverts commit 64c95ae.

Author: jcongc

backend/requirements.txt

@@ -7,7 +7,7 @@ certifi==2026.2.25
 cffi==2.0.0
 charset-normalizer==3.3.2
 click==8.1.7
-cryptography==48.0.1
+cryptography==46.0.6
 dnspython==2.6.1
 fastapi==0.135.2
 fastapi-limiter==0.1.6
@@ -18,7 +18,7 @@ hypothesis==6.61.0
 idna==3.15
 immutabledict==4.2.0
 iniconfig==2.0.0
-mypy==2.3.0
+mypy==1.10.0
 mypy-extensions==1.0.0
 ortools==9.15.6755
 packaging==26.0
@@ -30,7 +30,7 @@ pydantic==2.12.5
 PyJWT==2.13.0
 pymongo==4.16.0
 PyNaCl==1.6.2
-pypdf==6.14.2
+pypdf==6.13.3
 pytest==9.0.3
 python-dateutil==2.9.0.post0
 python-dotenv==1.2.2