[UX] Add an API that returns projects that lack active fleets #6092

Job	Run time
compute-version	2s
build-docs / build-docs	1m 17s
build-artifacts / runner-test (ubuntu-latest)	32s
build-artifacts / code-lint	45s
build-artifacts / gateway-build	10s
build-artifacts / frontend-build	8s
build-artifacts / runner-test (macos-latest)	43s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	23s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	26s
build-artifacts / python-build	22s
build-artifacts / generate-json-schema	20s
build-artifacts / python-test (macos-latest, 3.12)	3m 21s
build-artifacts / python-test (macos-latest, 3.11)	4m 15s
build-artifacts / python-test (ubuntu-latest, 3.9)	5m 4s
build-artifacts / python-test (macos-latest, 3.9)	2m 51s
build-artifacts / python-test (macos-latest, 3.13)	2m 48s
build-artifacts / python-test (macos-latest, 3.10)	2m 25s
build-artifacts / python-test (windows-latest, 3.11)	2m 9s
build-artifacts / python-test (ubuntu-latest, 3.10)	4m 50s
build-artifacts / python-test (ubuntu-latest, 3.11)	4m 44s
build-artifacts / python-test (windows-latest, 3.13)	1m 55s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 30s
build-artifacts / python-test (windows-latest, 3.12)	1m 58s
build-artifacts / python-test (ubuntu-latest, 3.12)	4m 57s
build-artifacts / python-test (windows-latest, 3.10)	2m 4s
build-artifacts / python-test (windows-latest, 3.9)	1m 53s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	14s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	21s
	55m 27s

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