Add Blossom Jenkins GPU CI (A10) and conda setup

[scal444]

Summary

Adds Blossom/Jenkins integration for this repo so GPU CI can run on pull requests against main:

• Jenkinsfile: single A10 GPU pod (nvidia.com/gpu_type: A10), CUDA 12.6 devel image, verify GPU, checkout PR, then pip install + pytest under conda (admin/setup_conda_env.sh).
• admin/setup_conda_env.sh: Miniforge + conda-forge stack (Python, RDKit, Boost, CMake, pytest, etc.) for the build container.

QA-style steps are not included here; those stay on GitHub Actions runners.

Test plan

• Trigger Blossom CI on this PR and confirm stages through pytest succeed.

[scal444]

/build

[greptile-apps]

Greptile Summary

This PR adds Blossom/Jenkins GPU CI infrastructure — a Jenkinsfile orchestrating the pipeline and admin/setup_conda_env.sh installing the conda environment. The previous review already flagged the main concerns (--no-check-certificate, missing else branch on PR state, missing trailing newline); the two remaining findings below are minor style/reliability notes.

Confidence Score: 5/5

Safe to merge; all remaining findings are P2 style/reliability suggestions.

The prior review's P1 issues (TLS verification bypass, missing error branch, missing newline) are the substantive blockers. The two new findings here are minor and do not block the primary CI path.

No files require special attention beyond the previously flagged items.

Important Files Changed

Filename	Overview
Jenkinsfile	Pipeline correctly handles Open/Merged states, but stage('Get Token') is outside try/catch, risking stuck commit statuses on credential failures.
admin/setup_conda_env.sh	Conda env setup script; version variables are unquoted in the final install command, and --no-check-certificate (flagged in prior review) is still present.

_{Greploops — Automatically fix all review issues by running /greploops in Claude Code. It iterates: fix, push, re-review, repeat until 5/5 confidence.
Use the Greptile plugin for Claude Code to query reviews, search comments, and manage custom context directly from your terminal.}

_{Reviews (2): Last reviewed commit: "Drop gpu_type selector, add 90-min timeo..." | Re-trigger Greptile}

[scal444]

/build