Add MotherboardUpdateRequest

[renatomassaro]

TODO

• Design cooldown mechanic (balance excessive mobo detach / NC unassignment). Delegated #358
• Figure out what to do when unassigning a NIP that is in use by other players. Delegated #359
• [x] MotherboardUpdatedEvent
• [x] MotherboardUpdateFailedEvent
• [x] Docs
• [x] Typespecs
• [x] Tests
• [x] Review if cache must be updated/invalidated due to a motherboard update
• [x] Allow direct switch from one mobo to another one (i.e. do it all in a single step)

Incidental

• Renamed channel/socket assignment access_type to access.
• Removed deprecated DB scheme from Cache (introduced at #338).

This change is 

[renatomassaro]

Reviewed 54 of 54 files at r1. Review status: all files reviewed at latest revision, 6 unresolved discussions, some commit checks broke.

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lib/entity/henforcer/entity.ex, line 83 at r1 (raw file):

    {true, owns_component_relay}
    | owns_component_error
  def owns_component?(entity_id = %Entity.ID{}, component, owned) do

Doc henforcers

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lib/server/event/motherboard.ex, line 5 at r1 (raw file):

  import Helix.Event

  event Updated do

doc everywhere

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lib/server/henforcer/component.ex, line 1 at r1 (raw file):

defmodule Helix.Server.Henforcer.Component do

docdocdoc

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lib/server/henforcer/server.ex, line 22 at r1 (raw file):

  Ensures the requested server exists on the database.
  """
  # TODO: REVIEW: Why does it accept `Server.t` as input?

Reviewed. Remove.

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lib/server/public/server.ex, line 57 at r1 (raw file):

  ::
    ServerFlow.update_mobo_result
  def update_mobo(server, {mobo, components, ncs}, entity_ncs, relay) do

doc

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lib/server/websocket/channel/server.ex, line 130 at r1 (raw file):

  @doc """
  Errors:

Missing params and return sections

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Comments from Reviewable

[sourcelevel-bot[bot]]

Ebert has finished reviewing this Pull Request and has found:

• 2 possible new issues (including those that may have been commented here).

You can see more details about this review at https://ebertapp.io/github/HackerExperience/Helix/pulls/357.

[renatomassaro]

Reviewed 12 of 13 files at r2, 7 of 7 files at r3. Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable