Make all standard optional dependencies install by default

[YOUSSEFELJAYAD]

What

Adds a single self-referential headroom-ai[all] entry to the core [project.dependencies] in pyproject.toml, so a plain pip install headroom-ai (or npm-style discovery → uvx/pipx) ships every standard feature out of the box.

Why

New users install headroom-ai, run headroom proxy, and hit:

Error: Proxy dependencies not installed. Run: pip install headroom-ai[proxy]

The CLI's headline commands (proxy, learn, code/memory features) all live behind optional extras, so the default install can't run them. This makes the documented quickstart fail until users discover and append the right extra.

How

dependencies = [
    ...
    "headroom-ai[all]",   # batteries-included default
]

• Reuses the same intra-package self-reference pattern the project already relies on for the all, proxy-prod, and voice-train extras — nothing new for the build backend (maturin) to support.
• [all] already curates the cross-platform-safe set (proxy, code, ml, memory, relevance, image, reports, otel, evals, voice, html, benchmark, mcp, spreadsheet).
• Platform-specific extras that [all] intentionally omits stay opt-in: pytorch-mps (macOS-only), proxy-prod/gunicorn (Unix-only), memory-stack (Qdrant/Neo4j). So Windows, CI, and Python 3.14 installs are unaffected.

Trade-off (please weigh)

This is deliberately the batteries-included direction: the default install gets heavier (pulls torch, transformers, etc. via [ml]/[voice]). That is the explicit goal of this PR — make the documented commands work with zero extra steps. If you'd prefer to keep the lean core, a lighter alternative would be to default only to [proxy] (what the quickstart actually needs) and/or emit a clearer "run pip install headroom-ai[all]" hint on missing extras. Happy to repoint this PR at either approach.

🤖 Generated with Claude Code

[github-actions]

PR governance

This PR does not yet satisfy the required template fields:

• Missing required section Description.
• Missing required section Type of Change.
• Missing required section Changes Made.
• Missing required section Testing.
• Missing required section Real Behavior Proof.
• Missing required section Review Readiness.
• Check I have performed a self-review before requesting human review.
• Check This PR is ready for human review or convert the PR back to draft.

Please update the PR body, or move the PR back to draft while it is still in progress.

[JerrettDavis]

This needs a different packaging shape before it can merge. Adding headroom-ai[all] to core [project.dependencies] makes the package depend on its own aggregate extra, which is a risky resolver/build behavior to rely on for the default install path. More importantly, [all] is not just the proxy quickstart surface: it pulls in heavy and specialized stacks such as ML/voice/evals/benchmark dependencies (torch, transformers, benchmark tooling, etc.) for every plain pip install headroom-ai.

That is too broad for a default enterprise install, especially when the stated failure is that headroom proxy needs the proxy extra. Please solve the quickstart/runtime gap more directly: either move the minimal proxy/runtime dependencies into the base install, make the CLI error/install hint clearer, or introduce a smaller default extra/install path that does not pull every optional feature. Also please include a lockfile/update and an install smoke test for the chosen packaging behavior so we know pip install headroom-ai and pip install "headroom-ai[all]" both resolve as intended.