fix(greader): stop sync from undoing mark all as read

[amerkay]

Summary

• Fixes "Mark all as read" silently leaving items unread on the server, observed against a Miniflux backend over the Google Reader API.
• Switches the bulk path in GoogleReaderRssService.markAsRead from per-ID edit-tag calls to the server's mark-all-as-read stream endpoint.

Why

The old flow pushed only IDs the local database knew about. Articles unread on the server but missing locally (pagination, archive, mid-sync) stayed unread, and the next sync flipped them back to unread on the client - producing the 515 → 0 → 1796 → 0 → 515 cycle described in #1271 and mentioned/related to #1157 (comment)

Scope

• Bulk mark-as-read (with optional before timestamp): now uses googleReaderAPI.markAllAsRead(streamId, ts) against AllItems / Feed / Category.
• Single-article toggle and mark-as-unread: unchanged - still per-ID editTag.

The endpoint is part of the standard Google Reader API. Verified against Miniflux only; behavior against other Google Reader / FreshRSS backends has not been tested but should be no worse than the current per-ID approach.

Closes #1271

Tested

• Miniflux account: mark all as read → app shows 0, web UI shows 0, pull-to-refresh keeps it at 0.
• Mark a single article unread → still works.
• Mark all in a single feed → only that feed clears.
• Mark all in a group → only that group clears.
• Mark as read with the "1 day / 3 days / 7 days" filter → only items older than the cutoff are marked.

[amerkay]

This broke it when you use the "Mark all as read" feature when offline.

Stack trace when offline

Version: 0.16.1

Device: Google Pixel 6a

System: Android 16 (API 36)

Stack trace:

java.net.UnknownHostException: Unable to resolve host "miniflux.example.com": No address associated with hostname
	at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:124)
	at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:103)
	at java.net.InetAddress.getAllByName(InetAddress.java:1152)
	at okhttp3.Dns$Companion$DnsSystem.lookup(Dns.kt:49)
	at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.kt:169)
	at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.kt:132)
	at okhttp3.internal.connection.RouteSelector.next(RouteSelector.kt:74)
	at okhttp3.internal.connection.RealRoutePlanner.planConnect(RealRoutePlanner.kt:157)
	at okhttp3.internal.connection.RealRoutePlanner.plan(RealRoutePlanner.kt:69)
	at okhttp3.internal.connection.FastFallbackExchangeFinder.launchTcpConnect(FastFallbackExchangeFinder.kt:118)
	at okhttp3.internal.connection.FastFallbackExchangeFinder.find(FastFallbackExchangeFinder.kt:62)
	at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:268)
	at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:95)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:84)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:65)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:205)
	at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:543)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1154)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:652)
	at java.lang.Thread.run(Thread.java:1563)
	Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@a628baa, Dispatchers.IO]

I see there was an attempt to fix:

ReadYou/app/src/main/java/me/ash/reader/domain/service/GoogleReaderRssService.kt

Lines 379 to 388 in 19d4973

	// launch {
	// val toBeReadRemote = localReadIds.intersect(remoteUnreadIds.await())
	// if (toBeReadRemote.isNotEmpty()) {
	// googleReaderAPI.editTag(
	// itemIds = toBeReadRemote.toList(),
	// mark = GoogleReaderAPI.Stream.Read.tag,
	// )
	// }
	// }

I will investigate and report back with a better pull request.