feat(package): gitea: add heatmap contribution model

package/gitea/source/models/migrations/migrations.go

@@ -405,6 +405,7 @@ func prepareMigrationTasks() []*migration {
 		newMigration(328, "Add TokenPermissions column to ActionRunJob", v1_26.AddTokenPermissionsToActionRunJob),
 		newMigration(329, "Add unique constraint for user badge", v1_26.AddUniqueIndexForUserBadge),
 		newMigration(330, "Add name column to webhook", v1_26.AddNameToWebhook),
+		newMigration(331, "Create heatmap contribution table", v1_26.CreateHeatmapContributionTable),
 	}
 	return preparedMigrations
 }

package/gitea/source/models/migrations/v1_26/v331.go

@@ -0,0 +1,38 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_26
+
+import (
+	"code.gitea.io/gitea/modules/timeutil"
+
+	"xorm.io/xorm"
+	"xorm.io/xorm/schemas"
+)
+
+type HeatmapContribution struct { //revive:disable-line:exported
+	ID          int64              `xorm:"pk autoincr"`
+	UserID      int64              `xorm:"NOT NULL"`
+	RepoID      int64              `xorm:"NOT NULL"`
+	CommitSHA   string             `xorm:"VARCHAR(64) NOT NULL"`
+	AuthorEmail string             `xorm:"VARCHAR(320) NOT NULL"`
+	AuthorUnix  timeutil.TimeStamp `xorm:"NOT NULL"`
+	CreatedUnix timeutil.TimeStamp `xorm:"created"`
+	UpdatedUnix timeutil.TimeStamp `xorm:"updated"`
+}
+
+// TableIndices implements xorm's TableIndices interface.
+func (c *HeatmapContribution) TableIndices() []*schemas.Index {
+	uniqueContribution := schemas.NewIndex("repo_commit_user", schemas.UniqueType)
+	uniqueContribution.AddColumn("repo_id", "commit_sha", "user_id")
+
+	userAuthorRepo := schemas.NewIndex("u_a_r", schemas.IndexType)
+	userAuthorRepo.AddColumn("user_id", "author_unix", "repo_id")
+
+	return []*schemas.Index{uniqueContribution, userAuthorRepo}
+}
+
+func CreateHeatmapContributionTable(x *xorm.Engine) error {
+	_, err := x.SyncWithOptions(xorm.SyncOptions{IgnoreDropIndices: true}, new(HeatmapContribution))
+	return err
+}