feat(preprod): Add analytics to the assemble endpoint

[trevor-e]

Adds some simple analytics to our endpoint so we can begin building a dashboard in Amplitude.

[codecov]

❌ 22 Tests Failed:

Tests completed	Failed	Passed	Skipped
26630	22	26608	241

View the top 3 failed test(s) by shortest run time

tests.sentry.preprod.api.endpoints.test_organization_preprod_artifact_assemble.ProjectPreprodArtifactAssembleTest::test_assemble_json_schema_chunks_wrong_type

Stack Traces | 2.13s run time

#x1B[1m#x1B[.../api/endpoints/test_organization_preprod_artifact_assemble.py#x1B[0m:246: in test_assemble_json_schema_chunks_wrong_type
    assert response.status_code == 400, response.content
#x1B[1m#x1B[31mE   AssertionError: b'{"detail":"Internal Error","errorId":null}'#x1B[0m
#x1B[1m#x1B[31mE   assert 500 == 400#x1B[0m
#x1B[1m#x1B[31mE    +  where 500 = <Response status_code=500, "application/json">.status_code#x1B[0m

tests.sentry.preprod.api.endpoints.test_organization_preprod_artifact_assemble.ProjectPreprodArtifactAssembleTest::test_assemble_json_schema_integration

Stack Traces | 2.14s run time

#x1B[1m#x1B[.../api/endpoints/test_organization_preprod_artifact_assemble.py#x1B[0m:185: in test_assemble_json_schema_integration
    assert response.status_code == 400
#x1B[1m#x1B[31mE   assert 500 == 400#x1B[0m
#x1B[1m#x1B[31mE    +  where 500 = <Response status_code=500, "application/json">.status_code#x1B[0m

tests.sentry.preprod.api.endpoints.test_organization_preprod_artifact_assemble.ProjectPreprodArtifactAssembleTest::test_assemble_with_metadata

Stack Traces | 2.17s run time

#x1B[1m#x1B[.../api/endpoints/test_organization_preprod_artifact_assemble.py#x1B[0m:367: in test_assemble_with_metadata
    assert response.status_code == 200, response.content
#x1B[1m#x1B[31mE   AssertionError: b'{"detail":"Internal Error","errorId":null}'#x1B[0m
#x1B[1m#x1B[31mE   assert 500 == 200#x1B[0m
#x1B[1m#x1B[31mE    +  where 500 = <Response status_code=500, "application/json">.status_code#x1B[0m

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