Merge updates for sources, destinations and api_keys

[vklimontovich]

Problem

At the moment, configurator UI updates all entities such as source destination and api_keys with a single query that overrides existing data in storage (redis). This approach is potentially vulnerable to edit conflicts - whoever send an update request the last will overwrite all previous edits.

Also, sources collection can become pretty large with recent additions from airbyte and the initial app load takes a while. Partial get can make UX nicer

Partial updates

Here's a request

POST /configurations/${collectionName}?id=${key} #example POST /configurations/destinations?id=${key}

{
  "arrayPath": "destinations",
  "object": {
    "idFieldPath": "_uid",
    "value": "vvd5ss1ue8qj26ex853gze"
  },
  "patch": {
    "_formData": {
      "newField": "test",
      "pghost": "updatedValue",
      "pgschema": null
    }
  }
}

Server should do the following:

• Aquire lock collectionName/id
• Find a node at arrayPath node. Assume that the path is an array (fail otherwise)
• Find an object within array where idFieldPath is value
• Merge that object with patch
• Put updated object to redis
• Release lock

Also, we need to acquire locks before pulling data from Redis (if we can implement read/write locks quickly - cool, otherwise let's stick with plain locks)

Let's also implement partial reads as an optional feature for GET configurations/{collectionName}?id={id} calls:

• GET configurations/{collectionName}?id={id}&remove_from_array={arrayPath}&fields=catalog,config/config

• GET configurations/{collectionName}?id={id}&filter_array={arrayPath}&idPathField=_uid&value=vvd5ss1ue8qj26ex853gze

(this task also includes making changes in HttpServerStorage implements ServerStorage on frontend

[vklimontovich]

Note on json paths: syntax should be a.b.c or /a/b/c. If the latter, a should be equivalent to /a