Add unique identifier in version tags

* Add a unique identifier in version tags to avoid problems like rename
  etc... this creates a unique way to identify which tag user have
  installed.
* Right now add the first image digest as the unique identifier, but
  since cloud uses a uuid v4 we should in future move to uuid v4

blueos_repository/extension/extension.py

@@ -1,4 +1,5 @@
 import asyncio
+import uuid
 from typing import Dict, List
 
 import aiohttp
@@ -148,7 +149,16 @@ async def __create_version_from_tag_blob(self, version_tag: Tag, blob: Blob) ->
                 Logger.warning(self.identifier, str(error))
                 readme = str(error)
 
+        images = self.__extract_images_from_tag(version_tag)
+        if not images:
+            Logger.error(
+                self.identifier,
+                f"Could not find images associated with tag {version_tag.name} for extension {self.identifier}"
+            )
+
+        tag_identifier = str(uuid.uuid5(uuid.NAMESPACE_DNS, f"{self.identifier}.{version_tag.name}"))
         return ExtensionVersion(
+            identifier=tag_identifier,
             tag=version_tag.name,
             type=labels.get("type", ExtensionType.OTHER),
             website=links.pop("website", labels.get("website", None)),

blueos_repository/extension/models.py

@@ -90,6 +90,8 @@ class ExtensionVersion:
     Represents a version of an extension.
 
     Attributes:
+        identifier (str): Unique identifier of this tag version, in extension repository is the 256 sha digest from the
+            first compatible image, in BlueOS cloud is a uuid v4.
         tag (Optional[str]): Tag of the version.
         type (ExtensionType): Type of the extension.
         website (str): URL to the extension's website.
@@ -105,6 +107,7 @@ class ExtensionVersion:
         images (List[Image]): Images available for the extension.
     """
 
+    identifier: str # TODO - In future try to unify with identifiers coming from cloud
     type: ExtensionType
     website: str
     images: List[Image]