Initial commit: CI Agent competitive-intelligence monitoring app

FastAPI + Celery + Next.js + Postgres/Redis app with company monitoring,
source collection, LLM-based change analysis, enrichment, and account
security (Turnstile, escalating lockout, email verification).

apps/api/app/schemas/system_secret.py

@@ -0,0 +1,16 @@
+from __future__ import annotations
+
+from pydantic import BaseModel, Field
+
+
+class SystemSecretStatus(BaseModel):
+    key: str
+    label: str
+    configured: bool
+    value: str | None
+
+
+class SetSystemSecretRequest(BaseModel):
+    # Blank clears the stored override, falling back to the server's
+    # .env-configured value again.
+    value: str = Field(default="", max_length=2000)