common/Scripts/publish_series.py: Publish series faster

[silkeh]

Summary

Increase the performance of checking known builds by getting the list of builds only once before starting. This is mostly apparent in a dry-run, which now only does one HTTP call for the entire run.

Improve the output of builds by showing the commit message instead of the raw python object. This turns lines like the following:

Pushing build: Build(source='python-setuptools', tag='python-setuptools-82.0.1-26', path='packages/py/python-setuptools', ref='d3562c463b73375afa3eca88a48fffd850b84086', comment='BUILD 1/11')

Into:

Pushing build: python-setuptools: Update to v82.0.1 (https://github.com/getsolus/packages/commit/d3562c463b73375afa3eca88a48fffd850b84086)

Test Plan

Run script against the LLVM 20 PR:

$ ./common/Scripts/publish_series.py --base 3bbb8c1ee4 --head c36143e728 --dry-run
Pushing to Git
Pushing build: llvm: Update to v20.1.8 (055f8cc38c)
Pushing build: spirv-headers: Update to v1.4.335.0 (3f8fd64384)
Pushing build: llvm: Rebootstrap against itself (4f6b2fe5bd)
Pushing build: linux-tools: Rebuild against libLLVM 20 (df0761678d)
Pushing build: bcc: Rebuild against libLLVM 20 (c1617dcf98)
Pushing build: bpftrace: Rebuild against llvm 20 (1d2f1ac353)
Pushing build: doxygen: Rebuild against LLVM 20 (bdb384d7a5)
Pushing build: gnome-builder: Rebuild against LLVM 20 (8a2c125225)
Pushing build: ispc: Update to v1.29.1 & rebuild against llvm 20 (ffbc9f561e)
Pushing build: kdevelop: Rebuild against LLVM 20 (df6db42dec)
Pushing build: rust: Bootstrap v1.92.0 against LLVM 20 (a0b94b803d)
Pushing build: lldb: Update to v20.1.8 (8c7e4ad89d)
Pushing build: rust: Debootstrap (e062ab2058)
Pushing build: spirv-tools: Update to v2025.5 (c67d00b593)
Pushing build: spirv-llvm-translator: Update to v20.1.8 (a8c8840037)
Pushing build: mesalib: Rebuild against LLVM 20 (defc143ef8)
Pushing build: openshadinglanguage: Update to v1.15.0.0 & rebuild against LLVM 20 (c62c85eecf)
Pushing build: python-pyside6: Rebuild against LLVM 20 (540189e844)
Pushing build: qt5-tools: Rebuild against LLVM 20 (44ec96c28a)
Pushing build: qt6-tools: Rebuild against LLVM 20 (69d561481b)
Pushing build: qt-creator: Rebuild against LLVM 20 (9428c09d8c)
Pushing build: ldc: Rebuild against LLVM 20 (b2f67a497b)
Pushing build: zig: Update to v0.15.2 & rebuild against LLVM 20 (e4872cb0a7)
Skipping commit: packages: Remove opencl-clang (04225656d3)
Skipping commit: repo_data: Deprecate opencl-clang (c36143e728)

Checklist

• Package was built and tested against unstable
• This change could gainfully be listed in the weekly sync notes once merged

[EbonJaeger]

Tested with the latest Plasma PR. Fast like lightning. Thanks!