__read_dep_graph() iterates over the given sections (flavours), but
the loop body does not use the loop variable: it passes the entire
sections list to get_project_refs() on every iteration, so the same
lookup is repeated for each section, and the recursion into the
found dependencies is re-triggered (and skipped) for each of them.
Remove the loop and do the lookup once per project.
Assisted-by: unsloth/Qwen3.8-27B-GGUF:Q4_K_M with pi.dev v0.84.2
Signed-off-by: Jan Lindemann <jan@janware.com>