To kick off our (tsdb) storage backends this adds our first implementing
a new `Storage(Protocol)` client interface. Going foward, the top level
`.storage` pkg-module will now expose backend agnostic APIs and helpers
whilst specific backend implementations will adhere to that middle-ware
layer.
Deats:
- add `.storage.marketstore.Storage` as the first client implementation,
moving all needed (import) dependencies out from
`.service.marketstore` as well as `.ohlc_key_map` and `get_client()`.
- move root `conf.toml` loading from `.data.history` into
`.storage.__init__.open_storage_client()` which now takes in a `name:
str` and does all the work of loading the correct backend module, its
config, and determining if a service-instance can be contacted and
a client loaded; in the case where this fails we raise a new
`StorageConnectionError`.
- add a new `.storage.get_storagemod()` just like we have for brokers.
- make `open_storage_client()` also return the backend module such that
the history-data layer can make backend specific calls as needed (eg.
ohlc_key_map).
- fall back to a basic non-tsdb backfill when `open_storage_client()`
raises the new connection error.
The plan is to offer multiple tsdb and other storage backends (for
a variety of use cases) and expose them similarly to how we do for
broker and data providers B)
Using the new `._ahab.start_ahab_service()` mngr of course, and now
support user config overrides (such that our defaults can be modified by
a keen user, say using a config file, or for testing). This is where the
functionality moved out of the `pikerd` init has been moved - instead of
being triggered by bool flag inputs to that factory.
For marketstore actually support overriding the entire yaml config via
runtime `_yaml_config_str: str` formatting with any passed user dict,
primarily focussing on supporting override of the sockaddrs for testing.
Mostly renaming from the old acronym. This also contains necessary
conf.toml loading in order to call `open_storage_client()` which now
does not have default network contact info.
Tyler Goodlet