chore: align Bioconda recipe starter

[ehsanestaji]

Align the in-repo Bioconda starter with the upstream recipe submitted for v0.1.1.

Changes:

• Remove unnecessary zlib host/run dependency because gzip support is pure Rust in the locked dependency graph.
• Replace GNU-only install -D with portable mkdir -p plus install -m644.
• Add release metadata tests to guard both packaging assumptions.

Verification:

• bash -n packaging/bioconda/build.sh
• python3 -m unittest discover tests/python -v
• git diff --check