Limit tree-sitter project indexing memory #6562

Job	Run time
build-and-check	2m 56s
test-integration-packages/billing	1m 31s
test-integration-packages/internal	1m 18s
test-common	52s
test-packages/internal	53s
test-integration-common	42s
test-integration-web	45s
test-integration-packages/agent-runtime	39s
test-integration-sdk	1m 18s
test-.agents	39s
test-packages/billing	42s
test-integration-cli	39s
test-sdk	43s
test-cli	56s
test-web	1m 8s
test-packages/agent-runtime	44s
	16m 25s

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