Improve out of order op processing

[GaryWilber]

Consider the following scenario:

1. Client loads a summary @ seq 150 and connects to the document
2. Server sends the client their join op @ seq 160
   • This causes the client to add that op into pending and call fetchMissingDeltas to ask for ops 151 - 159
   • Lets say the storage api is not returning any deltas. At this point the client keeps retrying that call until it gets them
3. Server sends the client ops 151 - 159 through the WebSocket
4. Client processes ops 151 - 159

At this point the client has all the ops it needs to be fully connected. However deltaManager did not process op 160, which remains in pending. So the client is stuck waiting for fetchMissingDeltas to complete. This PR makes the client process that pending op so it won't get stuck.

Changes:

• Process pending ops after successfully processing an inbound op
• Stop trying to fetch deltas from storage if the delta manager already caught up
• Replace catchUpCore method with processPendingOps method that only processes pending ops

[vladsud]

I do not think making an empty call is required, or we do it in other places.

[GaryWilber]

The callback invokes this.refreshDelayInfo(this.deltaStorageDelayId);. If we skip this callback, that won't be called. Is that okay?

[GaryWilber]

I updated it to not pass anything so only refreshDelayInfo is invoked.

[vladsud]

It's important. I think it's cleaner for fetchMissingDeltas() to call it after it's done.

[GaryWilber]

I assume it still has to call refreshDelayInfo in every callback too?

[vladsud]

Yes

[msfluid-bot]

⯅ @fluidframework/base-host: +267 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
main.js	166.94 KB	167.2 KB	⯅ +267 Bytes
Total Size	166.94 KB	167.2 KB	⯅ +267 Bytes

■ @fluid-example/bundle-size-tests: No change

Metric Name	Baseline Size	Compare Size	Size Diff
container.js	191.32 KB	191.32 KB	■ No change
map.js	45.84 KB	45.84 KB	■ No change
matrix.js	144.52 KB	144.52 KB	■ No change
odspDriver.js	193.22 KB	193.22 KB	■ No change
sharedString.js	158.46 KB	158.46 KB	■ No change
Total Size	733.36 KB	733.36 KB	■ No change

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Baseline commit: a252465

Generated by 🚫 dangerJS against 229d845