feat: add Bitdefender GravityZone integration module

Adds full GravityZone API integration to ClaudeTools. Key additions:

- api/services/gravityzone_service.py: JSON-RPC client with Basic auth,
  methods for company/endpoint/quarantine/licensing data, and security_sweep
  which paginates all endpoints, enriches with malware/agent status, and
  sorts infected > outdated > clean
- api/schemas/gravityzone.py: Pydantic response models for all endpoints
- api/routers/gravityzone.py: 7 REST endpoints at /api/gravityzone/*,
  JWT-protected, returns 502 on downstream GZ errors
- api/config.py: GRAVITYZONE_API_KEY + GRAVITYZONE_API_BASE_URL settings
- api/main.py: router registered under /api/gravityzone

Vault entry: msp-tools/gravityzone.sops.yaml (partner-level key, 14 modules)
Server .env updated, ticktick router synced, service restarted and verified.

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

api/schemas/gravityzone.py

@@ -0,0 +1,52 @@
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class GZEndpointItem(BaseModel):
+    id: str
+    name: str
+    fqdn: Optional[str] = None
+    ip: Optional[str] = None
+    os_version: Optional[str] = None
+    is_managed: bool
+    policy_name: Optional[str] = None
+
+
+class GZEndpointDetail(BaseModel):
+    id: str
+    name: str
+    company_id: Optional[str] = None
+    infected: bool
+    detection_active: bool
+    signature_outdated: bool
+    product_outdated: bool
+    agent_version: Optional[str] = None
+    engine_version: Optional[str] = None
+    last_seen: Optional[str] = None
+    last_update: Optional[str] = None
+    state: int
+    modules: Optional[dict] = None
+
+
+class GZCompanyItem(BaseModel):
+    id: str
+    name: str
+    type: int
+
+
+class GZSweepResult(BaseModel):
+    total: int
+    infected: int
+    signature_outdated: int
+    product_outdated: int
+    not_seen_recently: int
+    endpoints: list[dict]
+
+
+class GZStatusResponse(BaseModel):
+    enabled_apis: list[str]
+    key_created_at: Optional[str] = None
+    used_slots: Optional[int] = None
+    total_slots: Optional[int] = None
+    expiry_date: Optional[str] = None