refactor: Updated rest_api schema for tables to be consistent with Document.to_dict

[sjrl]

Related Issues

• fixes Table format of API search request different #3866

Proposed Changes:

Updated schema in rest_api to make returned table format consistent with how it is returned when using Haystacks' Document.to_dict() (shown below)

haystack/haystack/schema.py

Lines 163 to 165 in 9e457db

	# Convert pd.DataFrame to list of rows for serialization
	if self.content_type == "table" and isinstance(self.content, pd.DataFrame):
	v = [self.content.columns.tolist()] + self.content.values.tolist()

How did you test it?

Updated existing unit test.

Notes for the reviewer

Since this is changing the schema of the rest_api should this be labelled as a breaking change?

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added tests that demonstrate the correct behavior of the change
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[sjrl]

@mayankjobanputra This is ready for review! I'm not sure why the license/cla is taking so long to report, do you have any idea if we could retrigger this check?

[mayankjobanputra]

LGTM. I will merge this after we merge the version bump up PR :)

[sjrl]

LGTM. I will merge this after we merge the version bump up PR :)

Just to clarify @mayankjobanputra would this not be included in the v1.13 release then?