feat(pages): 增加来源扫描与自动更新

为 GitHub latest 来源增加五分钟 scanner、按来源间隔检查、精确 revision 自动发布与租约恢复。\n记录退避和投递统计，并为 PostgreSQL 与 SQLite 幂等创建内部排程。

internal/apps/openflare/pages/source_manual_test_helpers_test.go

@@ -0,0 +1,51 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package pages
+
+import (
+	"context"
+	"time"
+
+	"github.com/Rain-kl/Wavelet/internal/apps/upload"
+	"github.com/Rain-kl/Wavelet/internal/model"
+)
+
+func syncRemoteSource(
+	ctx context.Context,
+	snapshot *sourceExecutionSnapshot,
+	actor string,
+) (*sourceSyncOutcome, error) {
+	return syncRemoteSourceWithTrigger(ctx, snapshot, actor, pagesSourceTriggerManualSync)
+}
+
+func syncGitHubSource(
+	ctx context.Context,
+	snapshot *sourceExecutionSnapshot,
+	actor string,
+	targetRevision string,
+	confirmedRevision string,
+) (*sourceSyncOutcome, error) {
+	return syncGitHubSourceWithTrigger(
+		ctx, snapshot, actor, targetRevision, confirmedRevision, pagesSourceTriggerManualSync,
+	)
+}
+
+func commitSourceDeployment(
+	ctx context.Context,
+	snapshot *sourceExecutionSnapshot,
+	revision string,
+	packageChecksum string,
+	detail sourceDetail,
+	detailJSON string,
+	actor string,
+	manifest *deploymentManifest,
+	ingestResult upload.IngestResult,
+	hasIngest bool,
+	nextCheckNotBefore *time.Time,
+) (*model.PagesDeployment, bool, bool, error) {
+	return commitSourceDeploymentWithTrigger(
+		ctx, snapshot, revision, packageChecksum, detail, detailJSON, actor,
+		pagesSourceTriggerManualSync, manifest, ingestResult, hasIngest, nextCheckNotBefore,
+	)
+}