chore(adr-184): promote wifi-densepose to 2.0.0 stable + ruview 2.0.0 (P2)

ADR-184 P2 (version promotion + changelog) — version-metadata prep only;
triggers NO publish (P3's real PyPI upload is still gated on the manual
Trusted Publisher registration on pypi.org).

- python/pyproject.toml: version 2.0.0a1 -> 2.0.0; classifier
  "Development Status :: 3 - Alpha" -> "5 - Production/Stable".
- python/ruview-meta/pyproject.toml: version 2.0.0a1 -> 2.0.0; same
  classifier bump; repointed the wifi-densepose dependency pins
  (base + [client]) from ==2.0.0a1 to ==2.0.0 so the stable ruview
  meta-package depends on the stable wifi-densepose, not the alpha.
- python/wifi_densepose/__init__.py: runtime __version__ 2.0.0a1 -> 2.0.0
  (caught during the sanity check — it would otherwise contradict the
  stable wheel version reported by `wifi_densepose.__version__`).
- CHANGELOG.md: [Unreleased] entry recording the promotion.

Sanity-checked that the core package genuinely deserves "Production/Stable"
(not just a version-string change):
  maturin build --release --strip  -> default wheel 279 KB
  pytest python/tests/ (excluding [aether]/[meridian]/[mat] extra modules)
    -> 185 passed, 0 failed (smoke/keypoint/pose/vitals/bfld/security/
       WS+MQTT client)
  post-bump: wheel installs as 2.0.0, __version__ = 2.0.0, smoke 6/6 pass.
No publish/tag/release commands were run.

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Changed
+- **`wifi-densepose` promoted to `2.0.0` stable; `ruview` `2.0.0` first stable publish (ADR-184 P2).** Dropped the `a1` alpha suffix on both sibling packages (`python/pyproject.toml`, `python/ruview-meta/pyproject.toml`) and flipped their trove classifier `Development Status :: 3 - Alpha` → `5 - Production/Stable`; the `ruview` meta-package's `wifi-densepose==2.0.0a1` dependency pins (base + `[client]`) were repointed to `==2.0.0`. Pip-release now authenticates via Trusted Publishing (see the entry below). **Version-metadata prep only — nothing is published by this change**: the actual PyPI upload (ADR-184 P3) is still gated on the one-time manual Trusted Publisher registration on pypi.org that only the repo owner can perform. Justified as "stable": the default (no-extras) wheel builds at 279 KB (`maturin build --release --strip`) and the base non-SOTA suite is green — `pytest python/tests/` (excluding the `[aether]`/`[meridian]`/`[mat]` extra modules) = **185 passed, 0 failed** (smoke / keypoint / pose / vitals / bfld / security / WS+MQTT client).
 - **CI (ADR-184): `pip-release.yml` publish job migrated to PyPI OIDC Trusted Publishing** (commit `cc153e8b5`; refs #785, completes ADR-117). The release workflow now authenticates to PyPI via short-lived OIDC tokens (`id-token: write`) instead of a long-lived `PYPI_API_TOKEN` secret. **Not yet active**: publishing will fail until the matching Trusted Publisher is registered manually on pypi.org (a one-time, per-project step that cannot be automated from CI) — ADR-184 P1 tracks this as the remaining gate (status recorded in `dfc4c1abd`).
 - **`@ruvnet/rvagent` startup optimization — stdio time-to-first-response ~242 ms → ~189 ms (−22%; MEASURED, median of repeated `initialize` round-trips against `dist/index.js`, this container, reproduce with a piped-stdin timer).** Two changes: (1) `./http-transport.js` is now imported **lazily** inside the `RVAGENT_HTTP_PORT` branch — it chain-loads the MCP SDK's `streamableHttp` module (~48 ms MEASURED via per-module `import()` timing), which the default stdio path never uses; (2) the advertised JSON Schemas generated from the Zod sources are memoized per tool instead of re-walking the Zod tree on every `tools/list` (matters under the session-per-server HTTP model where each session lists tools). No behavior change: 99/99 jest tests, HTTP session flow re-smoke-tested through the lazy path. The `@ruvnet/ruview` harness CLI was profiled too and left alone — 50 ms vs the ~29 ms bare `node -e ''` floor on the same box (MEASURED), i.e. already near the interpreter floor with zero dependencies.