chore(release): cut 1.0.0b2

[lishuoshuo-amd]

Summary

Cuts the 1.0.0b2 beta. Version-string and release-documentation changes only; no runtime logic is touched.

• Bumps 1.0.0b1 -> 1.0.0b2 in pyproject.toml, the README version badge, docs/conf.py, the docs/compatibility.rst support table, and the documented pip install pin in docs/install/install.md, examples/README.md, and the hyperloom-setup skill.
• Moves the accumulated Unreleased entries into a [v1.0.0b2] - 2026-08-19 section in CHANGELOG.md, relocates the "Current packaged version" marker off v1.0.0b1, and updates the link references.
• Adds a Hyperloom 1.0.0b2 release section to docs/release-notes.md summarizing the headline changes.
• Records the vLLM container image switch from docs: use official vllm/vllm-openai-rocm image for vLLM #1220, which landed without a changelog entry. The recommended image is now the official upstream vllm/vllm-openai-rocm:v0.27.1; the tag is a 1:1 replacement but its entrypoint is vllm serve, so a long-running Hyperloom container has to override it.
• Drops the empty ## Unreleased heading from docs/release-notes.md. It was introduced with a pending item that the 1.0.0b1 cut folded into the release section, leaving a bare heading that has rendered empty on the docs site since v1.0.0b1. CHANGELOG.md keeps its [Unreleased] section, which is conventional there.

install_baremetal.sh no longer needs a version bump: HYPERLOOM_WHEEL_TAG was removed in #1204.

docs/compatibility.rst is overwritten rather than appended to, which matches how the table has always been maintained: it carried only 1.0.0a3 at that tag and only 1.0.0b1 at the next, so it tracks the current validated combination. Per-version history stays on the Releases page.

Breaking changes in this release

This beta carries six breaking changes, all called out explicitly in the release notes:

• kernel_optimization.py no longer accepts --test-command / --test-harness-path.
• Four write-only artifacts are no longer produced (agent_transcript.jsonl, orchestration_turns.jsonl, mn_input_params_*.json, and the work_dir copy of semantic_audit.json).
• Magpie leak salvage no longer defaults to /workspace/; it requires $INFERENCE_OPTIMIZER_RESCUE_PATHS.
• vendor_kernel_config, operator_tuning, and deep_kernel_analysis are gone; sessions carrying these names are no longer resumable.
• actions/_meta/*.yaml and orchestrator/actions/registry.py are replaced by ACTION_CATALOGUE.
• The KERNEL_OPT_BACKENDS environment variable is removed.

Test plan

• pyproject.toml parses and reports 1.0.0b2.
• No stale 1.0.0b1 reference outside historical CHANGELOG / release-notes sections.
• Lint and packaging workflows pass.
• Docs build renders the new release-notes section without an empty Unreleased heading.
• Merge and tag as one operation: the v1.0.0b2 links in CHANGELOG.md and docs/release-notes.md are dead until the tag exists.
• After tagging: publish the wheel to PyPI and verify the documented pip install hyperloom-inference-optimizer==1.0.0b2 --target . resolves.

[github-actions]

CI E2E report — ❌ Failed

item	value
result	❌ Failed
model	Qwen/Qwen3-0.6B (dense)
resources	1× GPU, TP=1
PR branch	chore/bump-1.0.0b2
commit	f858d0bc9310e18b4b9963beee6eb4c3d89b47bf
session_id	b712405b-241c-4b78-9d18-12a93e593cdd
queue → dispatch	0s
run time	27m 28s
total	27m 28s
reason	platform reported Failed: BackoffLimitExceeded: Job has reached the specified backoff limit
detail	platform reported Failed: BackoffLimitExceeded: Job has reached the specified backoff limit

details