Switch Enum types to StrEnum

The base Enum type has interesting behaviour when it comes to equality.
Depending on how they were imported,
you may well encounter a situation where a variable containing an Enum
variant does not equal the Enum variant itself,
not with `==` nor with `is`.

This is very counter-intuitive and even broke HFS authentication in
tests.

Luckily, all our Enum types are string-backed already,
so we can switch them to inherit from StrEnum.
This means they for all intents and purposes behave like regular
strings,
and equality checks on them check equality of their `.value` strings.
Import path no longer matters and ObeliskKind.HFS will always equal
ObeliskKind.HFS, no matter the context.

Author: Epse

src/obelisk/types.py

@@ -1,10 +1,10 @@
-from enum import Enum
+from enum import StrEnum
 from typing import List, Any, Optional
 
 from pydantic import BaseModel
 
 
-class IngestMode(Enum):
+class IngestMode(StrEnum):
     """
     Classic Obelisk accepts three ways of submitting new data.
     This integrates with the concept of Streams,
@@ -22,7 +22,7 @@ class IngestMode(Enum):
     STORE_ONLY = 'store_only'
 
 
-class TimestampPrecision(Enum):
+class TimestampPrecision(StrEnum):
     """
     When ingesting data it is important to specify which precision provided UNIX timestamps are in.
     If a provided timestamp is in seconds,
@@ -42,14 +42,14 @@ class Datapoint(BaseModel, extra='allow'):
     dataset: Optional[str] = None
     metric: Optional[str] = None
     source: Optional[str] = None
-    userId: Optional[int] = None # Only if HFS and no other name for field
+    userId: Optional[int] = None  # Only if HFS and no other name for field
 
 
 class QueryResult(BaseModel):
     items: List[Datapoint]
     cursor: Optional[str] = None
 
 
-class ObeliskKind(Enum):
+class ObeliskKind(StrEnum):
     CLASSIC = 'classic'
     HFS = 'hfs'