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docs(architecture): flesh out architecture docs

Graphsync Requestor Receives Responses And Validates Them

Provide a detailed guide to the architecture of go-graphsync
Co-Authored-By: MollyM <momack2@users.noreply.github.com>

Successfully execute query on remote system and return results

Improve Error message on missing blocks, and also add missing comments

Move ResponseProgress to the types package and extract some testing functions to testutil

make sure order channels are consumed in repsonse collector doesn't block sends on the other

Make the request manager actually inject responses from the network, and perform a selector
verification

extracts parts of old asyncloader to load attempt queue
expands functionality of asyncloader to handle response cache
moves response cache and unverified block store under async laoder

wrapper around an async load to make a regular ipld.loader for the request manager

Continue to load links synchronously after network request completes

Async loader returns a single channel result type

Create a cache to manager how to track how long to keep unverified blocks around

move link tracker out of response manager so it can be used for requests

Create an in memory object for storing blocks received from the server temporarily

Create async loader to handle multiple load attempts as responses come in from network

Extract metadata encoding to a package and add a decoding feature

Proposal: Graphsync Public Interfaces

Co-Authored-By: hannahhoward <hannah@hannahhoward.net>

Outline interfaces for using Graphsync in a readme.

Graphsync responds to incoming requests

Complete functionality to initialize response manager and process incoming requests

fix #7, fix #8

Creates the Response Manager that processes incoming requests, initiates selector traversal, and
generates responses

Refactor peer manager to handle abstract processes, then use the base class for the peer message
manager and the peer response manager

Create a loader that wraps the underlying store loader and sends to network

Create a response manager for a single peer to handle assembling and managing responses for a given
peer

add a response builder that collects components of a response and then assembles a completed
response message

Create a link tracker that helps dedup block sends and also track if blocks are missing from
requests

Update the IPLD bridge for the newest version of IPLD prime and add a node builder method.

Convert GraphSyncRequest and GraphSyncResponse to structs, track by value, pass directly into add
methods on GraphSyncMessage

Add the ability to send blocks and receive notification when complete to messagequeue

Create a prioritized task queue for tracking blocks of tasks between peers

Graphsync user can make request to the network