Root output re-export (`from: sub.output`) cannot be used as another root output's input

[rpaviot]

What happened

In the root astra.yaml, a root output that re-exports a sub-analysis output (from: ia_fits.nla_multipoles)
was declared as an input of another root output with its own recipe (a paper figure using
{inputs.nla_multipoles}). astra validate accepts the spec, but lc run fails while generating the
Snakefile because the re-export is not resolved as a declared input of the consuming output. Moving the
figure/table outputs into a sub-analysis (analyses/paper/, inputs from: ../ia_fits.<id>) and
re-exporting them from the root works, so it seems specific to root-level outputs consuming root-level
re-exports.

Error

File ".../lightcone/cli/commands.py", line 597, in run
    snakefile_path, cfg_path = generate(
File ".../lightcone/engine/snakefile.py", line 421, in generate
    rendered = render_recipe(
File ".../lightcone/engine/snakefile.py", line 104, in render_recipe
    raise KeyError(
KeyError: "Recipe placeholder '{inputs.nla_multipoles}' references an input not declared on this Output"

Reproduction

Root astra.yaml:

outputs:
  - id: nla_multipoles
    from: ia_fits.nla_multipoles
  - id: fig3
    inputs: [nla_multipoles]
    recipe:
      command: python src/plot.py --fits-dir {inputs.nla_multipoles} --out {output}

astra validate astra.yaml -> Validation successful; lc run fig3 -> KeyError above.

Environment

• ASTRA: 0.2.11
• lightcone-cli: 0.4.2
• Python: 3.12.8
• OS: Linux 4.18 (RHEL 8, SLURM cluster, container runtime: none)