fix(linear): widen issue title/url columns to avoid truncation

_tool_linear_issues.title and .url were varchar(255), but Linear titles can
exceed 255 chars (and the issue URL embeds a title slug), so extraction failed
with 'Error 1406: Data too long for column title'. Drop the varchar limit so
both are longtext, matching the domain issues.title and jira's tool summary.

Adds an e2e test extracting a 300-char title without truncation.

Signed-off-by: Eduardo Rodrigues <2961314+eduardoarantes@users.noreply.github.com>

Author: eduardoarantes

backend/plugins/linear/e2e/issue_longtitle_test.go

@@ -0,0 +1,55 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package e2e
+
+import (
+	"testing"
+
+	"github.com/apache/incubator-devlake/core/dal"
+	"github.com/apache/incubator-devlake/helpers/e2ehelper"
+	"github.com/apache/incubator-devlake/plugins/linear/impl"
+	"github.com/apache/incubator-devlake/plugins/linear/models"
+	"github.com/apache/incubator-devlake/plugins/linear/tasks"
+	"github.com/stretchr/testify/assert"
+)
+
+// TestLinearIssueLongTitle guards against truncation/insert failure for long
+// issue titles and URLs. Linear titles can exceed 255 chars (and the issue URL
+// embeds a title slug), which overflowed the old varchar(255) columns and
+// failed extraction with "Data too long for column 'title'". The columns are
+// now untyped (longtext), matching the domain issues.title and jira's tool
+// summary.
+func TestLinearIssueLongTitle(t *testing.T) {
+	var linear impl.Linear
+	dataflowTester := e2ehelper.NewDataFlowTester(t, "linear", linear)
+
+	taskData := &tasks.LinearTaskData{
+		Options: &tasks.LinearOptions{ConnectionId: 1, TeamId: "team-1"},
+	}
+
+	dataflowTester.FlushTabler(&models.LinearIssue{})
+	dataflowTester.FlushTabler(&models.LinearIssueLabel{})
+	dataflowTester.ImportCsvIntoRawTable("./raw_tables/_raw_linear_issues_long_title.csv", "_raw_linear_issues")
+	// must not error with "Data too long for column 'title'"
+	dataflowTester.Subtask(tasks.ExtractIssuesMeta, taskData)
+
+	var issue models.LinearIssue
+	err := dataflowTester.Dal.First(&issue, dal.Where("connection_id = ? AND id = ?", 1, "issue-longtitle"))
+	assert.NoError(t, err)
+	assert.Len(t, issue.Title, 300, "full 300-char title must be stored untruncated")
+}

backend/plugins/linear/e2e/raw_tables/_raw_linear_issues_long_title.csv

@@ -0,0 +1,2 @@
+id,params,data,url,input,created_at
+1,"{""ConnectionId"":1,""TeamId"":""team-1""}","{""Id"":""issue-longtitle"",""Identifier"":""ENG-LONG"",""Number"":900,""Title"":""TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT"",""Description"":""long title row"",""Url"":""https://linear.app/eng/issue/ENG-LONG/tttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt"",""Priority"":0,""Estimate"":null,""CreatedAt"":""2026-05-01T00:00:00Z"",""UpdatedAt"":""2026-05-01T00:00:00Z"",""StartedAt"":null,""CompletedAt"":null,""CanceledAt"":null,""State"":{""Id"":""state-backlog"",""Name"":""Backlog"",""Type"":""backlog""},""Assignee"":null,""Creator"":null,""Cycle"":null,""Parent"":null,""Labels"":{""Nodes"":[]}}",https://api.linear.app/graphql,null,2026-05-01 00:00:00.000

backend/plugins/linear/models/issue.go

@@ -30,9 +30,9 @@ type LinearIssue struct {
 	TeamId        string     `gorm:"index;type:varchar(255)" json:"teamId"`
 	Identifier    string     `gorm:"type:varchar(255)" json:"identifier"`
 	Number        int        `json:"number"`
-	Title         string     `gorm:"type:varchar(255)" json:"title"`
+	Title         string     `json:"title"`
 	Description   string     `json:"description"`
-	Url           string     `gorm:"type:varchar(255)" json:"url"`
+	Url           string     `json:"url"`
 	Priority      int        `json:"priority"`
 	PriorityLabel string     `gorm:"type:varchar(100)" json:"priorityLabel"`
 	Estimate      *float64   `json:"estimate"`

backend/plugins/linear/models/migrationscripts/archived/models.go

@@ -76,9 +76,9 @@ type LinearIssue struct {
 	TeamId        string `gorm:"index;type:varchar(255)"`
 	Identifier    string `gorm:"type:varchar(255)"`
 	Number        int
-	Title         string `gorm:"type:varchar(255)"`
+	Title         string
 	Description   string
-	Url           string `gorm:"type:varchar(255)"`
+	Url           string
 	Priority      int
 	PriorityLabel string `gorm:"type:varchar(100)"`
 	Estimate      *float64