[UX] Add an API that returns projects that lack active fleets #6111

Job	Run time
compute-version	2s
build-docs / build-docs	1m 19s
build-artifacts / code-lint	41s
build-artifacts / frontend-build	1m 57s
build-artifacts / runner-test (macos-latest)	1m 5s
build-artifacts / runner-test (ubuntu-latest)	1m 14s
build-artifacts / gateway-build	10s
build-artifacts / generate-json-schema	19s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	33s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	33s
build-artifacts / python-build	23s
build-artifacts / python-test (macos-latest, 3.13)	2m 32s
build-artifacts / python-test (macos-latest, 3.12)	3m 36s
build-artifacts / python-test (macos-latest, 3.10)	2m 21s
build-artifacts / python-test (macos-latest, 3.11)	2m 31s
build-artifacts / python-test (windows-latest, 3.11)	1m 56s
build-artifacts / python-test (windows-latest, 3.10)	1m 58s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 20s
build-artifacts / python-test (ubuntu-latest, 3.9)	4m 34s
build-artifacts / python-test (ubuntu-latest, 3.12)	4m 52s
build-artifacts / python-test (ubuntu-latest, 3.11)	4m 35s
build-artifacts / python-test (windows-latest, 3.12)	1m 53s
build-artifacts / python-test (ubuntu-latest, 3.10)	4m 47s
build-artifacts / python-test (windows-latest, 3.9)	1m 37s
build-artifacts / python-test (macos-latest, 3.9)	3m 25s
build-artifacts / python-test (windows-latest, 3.13)	2m 0s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	17s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	16s
	55m 46s

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