Add 1 memory endpoint for Retrieving Points

[dave90]

Description

This pull request introduces two new memory endpoints:

• [GET] Retrieve all points from a single collection.
• [GET] Retrieve all points from all collections.

The retrieval of points from a single collection is paginated using offset and limit parameters.

Usage Examples retrieve all points from a single collection using offset:

    limit = 10
    next_offset = ""
    collection = "declarative"

    while True:
        res = requests.get(
            f"http://localhost:1865/memory/collections/{collection}/points?limit={limit}&offset={next_offset}",
        )
        json = res.json()
        points = json["points"]
        next_offset = json["next_offset"]

        for point in points:
            payload = point["payload"]
            vector = point["vector"]
            print(payload)
            print(vector)
        
        if next_offset is None:
            break
   

Related to issue #889

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

[dave90]

@pieroit should I go ahead and remove the endpoint "[GET] Retrieve all points from all collections" as we discussed during the dev meeting?

[pieroit]

@pieroit should I go ahead and remove the endpoint "[GET] Retrieve all points from all collections" as we discussed during the dev meeting?

Yes please :)

[pieroit]

Thank you @dave90 and sorry for the dealy.
Merged with a few tweaks:

• included the offset in the old VectorMemoryCollection.get_all_points method
• procedural memory is not readable (let's see if a polemic is born out of this :D)
• added test for missing or reserved (procedural) collection