Update flakeguard ticket db and jira assignee mapping

Author: lukaszcl

tools/flakeguard/.flaky_test_db.json

@@ -71,6 +71,24 @@
     "jira_ticket": "CCIP-4582",
     "skipped_at": "0001-01-01T00:00:00Z"
   },
+  "github.com/smartcontractkit/chainlink/integration-tests/smoke::TestKeeperNodeDown/registry_1_3": {
+    "test_package": "github.com/smartcontractkit/chainlink/integration-tests/smoke",
+    "test_name": "TestKeeperNodeDown/registry_1_3",
+    "jira_ticket": "DX-398",
+    "skipped_at": "0001-01-01T00:00:00Z"
+  },
+  "github.com/smartcontractkit/chainlink/v2/core/capabilities/integration_tests/keystone::Test_OneAtATimeTransmissionSchedule": {
+    "test_package": "github.com/smartcontractkit/chainlink/v2/core/capabilities/integration_tests/keystone",
+    "test_name": "Test_OneAtATimeTransmissionSchedule",
+    "jira_ticket": "DX-399",
+    "skipped_at": "0001-01-01T00:00:00Z"
+  },
+  "github.com/smartcontractkit/chainlink/v2/core/services/keeper::TestKeeperEthIntegration": {
+    "test_package": "github.com/smartcontractkit/chainlink/v2/core/services/keeper",
+    "test_name": "TestKeeperEthIntegration",
+    "jira_ticket": "DX-400",
+    "skipped_at": "0001-01-01T00:00:00Z"
+  },
   "github.com/smartcontractkit/chainlink/v2/core/services/workflows::TestEngine_ConcurrentExecutions": {
     "test_package": "github.com/smartcontractkit/chainlink/v2/core/services/workflows",
     "test_name": "TestEngine_ConcurrentExecutions",

tools/flakeguard/.jira_assignee_mapping.json

@@ -15,6 +15,15 @@
         "pattern": "github.com/smartcontractkit/chainlink/system-tests/tests/smoke/capabilities.*",
         "assignee": "63beffc42a526608c5501530"
     },
+    {
+        "pattern": "github.com/smartcontractkit/chainlink/v2/core/capabilities/integration_tests/keystone.*",
+        "assignee": "63beffc42a526608c5501530"
+    },
+    {
+        "pattern": "github.com/smartcontractkit/chainlink/v2/core/services/keeper",
+        "assignee": "61c3bc0d68926d0068ad903d",
+        "assignee_name": "Akshay"
+    },
     {
         "pattern": "github.com/smartcontractkit/chainlink/deployment.*",
         "assignee": "6175d3e016119e0069fdd14f"

tools/flakeguard/cmd/create_jira_tickets.go

@@ -35,8 +35,9 @@ var (
 
 // AssigneeMapping holds a regex pattern and its corresponding assignee.
 type AssigneeMapping struct {
-	Pattern  string `json:"pattern"`
-	Assignee string `json:"assignee"`
+	Pattern      string `json:"pattern"`
+	Assignee     string `json:"assignee"`
+	AssigneeName string `json:"assignee_name"`
 }
 
 var CreateTicketsCmd = &cobra.Command{