Issues from https://github.com/VERITAS-Observatory/EventDisplay_v4/issues/352

[GernotMaier]

No description provided.

[Copilot]

Pull request overview

Updates IRF packaging/downloading scripts and manifests to address issues reported in EventDisplay_v4#352, primarily by syncing V6 tarball manifests with current epoch definitions and fixing a few script logic/robustness problems.

Changes:

• Sync transfer/file_list_V6.dat with newer V6 epochs (2024–2026w) across multiple IRF product categories.
• Fix/clean up transfer and copy scripts (failed-transfer handling in download_irfs.sh, reachable atmosphere branch in V4/V5 gamma/hadron copy, SIMTYPE assignment cleanup).
• Documentation and release-note updates (README maintainer instructions + Towncrier fragment).

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
transfer/pack_irfs_for_ucla.sh	Fixes a misspelled function name and cleans up logging for V4/V5 effective-area packing.
transfer/file_list_V6.dat	Adds missing tarball entries for newer V6 epochs across DispBDTs/EffectiveAreas/GammaHadronBDTs/Tables.
README.md	Updates maintainer instructions and adds an informational note about XGB file availability.
GammaHadronBDTs/copy_GammaHadron_V4_V5_BDTs.sh	Fixes an incorrect atmosphere condition intended to select the “summer” branch for ATM22.
download_irfs.sh	Skips extraction/cleanup when the transfer step fails.
docs/changes/92.bugfix.md	Adds a Towncrier bugfix fragment summarizing the PR changes.
DispXGB/copy_dispXGB.sh	Comments out stale SIMTYPE assignments to avoid accidental overrides.
DispBDTs/copy_dispBDTs.sh	Comments out stale SIMTYPE assignments and fixes ${IRVERSION} → ${IRFVERSION} in logging.

Comments suppressed due to low confidence (2)

GammaHadronBDTs/copy_GammaHadron_V4_V5_BDTs.sh:27

• EPOCHS is assigned based on the atmosphere, but it is never used anywhere in this script. As written, this block just performs an unnecessary read/sort of V6 epoch lists in a V4/V5 copy script, which is confusing and makes it look like the code depends on those files when it does not.

    if [[ ${A} == "ATM22" ]]; then
        EPOCHS=$(cat ../IRF_EPOCHS_SUMMER.dat | sort -u)
    else
        EPOCHS=$(cat ../IRF_EPOCHS_WINTER.dat | sort -u)
    fi

GammaHadronBDTs/copy_GammaHadron_V4_V5_BDTs.sh:27

• EPOCHS is assigned based on the atmosphere, but it is never used anywhere in this script. As written, this block just performs an unnecessary read/sort of V6 epoch lists in a V4/V5 copy script, which is confusing and makes it look like the code depends on those files when it does not.

    if [[ ${A} == "ATM22" ]]; then
        EPOCHS=$(cat ../IRF_EPOCHS_SUMMER.dat | sort -u)
    else
        EPOCHS=$(cat ../IRF_EPOCHS_WINTER.dat | sort -u)
    fi

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