feat(uptime): add robots.txt rejection as an uptime check result (#444)

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Co-authored-by: getsantry[bot] <66042841+getsantry[bot]@users.noreply.github.com>

Author: klochek

examples/uptime-results/1/disallowed.json

@@ -0,0 +1,12 @@
+{
+  "guid": "54afc7ed9c53491481919c931f75bae1",
+  "subscription_id": "5421b5df80744113a6b57014f01a3a42",
+  "status": "disallowed_by_robots",
+  "status_reason": null,
+  "trace_id": "947efba02dac463b9c1d886a44bafc94",
+  "span_id": "58e84098e63f42e1",
+  "scheduled_check_time_ms": 1717614062978,
+  "actual_check_time_ms": 1717614068008,
+  "duration_ms": null,
+  "request_info": null
+}

schemas/uptime-results.v1.schema.json

@@ -7,7 +7,7 @@
       "title": "check_status",
       "description": "The status of the check",
       "type": "string",
-      "enum": ["success", "failure", "missed_window"]
+      "enum": ["success", "failure", "missed_window", "disallowed_by_robots"]
     },
     "CheckStatusReasonType": {
       "title": "check_status_reason_type",