fix: add missing orjson, beautifulsoup4, cryptography deps to pyproject.toml

Docker image was crash-looping with `ModuleNotFoundError: No module named 'orjson'`
because these packages were imported but not declared as dependencies.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/pyproject.toml

@@ -4,8 +4,10 @@ version = "0.9.6"
 requires-python = ">=3.10"
 dependencies = [
     "apscheduler==3.10.3",
+    "beautifulsoup4>=4.9.0",
     "cachetools==5.5.2",
     "cloudscraper==1.2.71",
+    "cryptography>=41.0.0",
     "fastapi==0.115.12",
     "feedparser==6.0.10",
     "httpx==0.28.1",
@@ -18,6 +20,7 @@ dependencies = [
     "requests==2.31.0",
     "reverse-geocoder==1.5.1",
     "sgp4==2.23",
+    "orjson>=3.10.0",
     "slowapi==0.1.9",
     "uvicorn==0.34.0",
     "yfinance==0.2.54",