docs: tighten README opener — harness vocab + 0.2.11 bump (#90)

Review feedback on #99:

- "Production-grade SDLC scaffold" -> "Production-grade SDLC harness".
  Everywhere else (package name, docs/HARNESS.md, CLAUDE.md) calls it
  a harness; "scaffold" was an unintentional vocabulary drift.
- "regardless of who's at the keyboard" -> "regardless of who shipped
  the code". Agents don't have keyboards; the original metaphor leaked.
  The new phrasing covers humans and agents without forcing the
  human-only mental model.
- README opener now also mirrors the GitHub repo description verbatim
  ("human-LLM coding collaborations"), so the two surfaces stay
  aligned.

Also bumps the project version 0.2.10 -> 0.2.11 (docs change -> PATCH
per docs/DEVELOPMENT.md) in pyproject.toml and the self-version line
in uv.lock, unblocking the "Version bump check" CI gate that flagged
the original commit.

The "enforced mechanically in CI, not by discipline" punchline is
preserved verbatim.

Refs #90

Author: constk

README.md

@@ -8,7 +8,7 @@
 [![React 19.2](https://img.shields.io/badge/react-19.2-61dafb.svg)](https://react.dev/)
 [![Coverage 98%](https://img.shields.io/badge/coverage-98%25-brightgreen.svg)](docs/HARNESS.md)
 
-> Production-grade SDLC scaffold for teams pairing AI agents with human engineers — keeping quality consistent regardless of who's at the keyboard. Python (FastAPI) + Vite/React/TypeScript, with every gate (lint, types, architecture, security, eval) enforced mechanically in CI, not by discipline.
+> Production-grade SDLC harness for human–LLM coding collaborations — keeping quality consistent regardless of who shipped the code. Python (FastAPI) + Vite/React/TypeScript, with every gate (lint, types, architecture, security, eval) enforced mechanically in CI, not by discipline.
 
 ## What ships
 

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "harness-python-react"
-version = "0.2.14"
+version = "0.2.15"
 description = "Production-quality LLM-driven coding harness — Python (FastAPI) backend, Vite + React + TypeScript frontend."
 readme = "README.md"
 requires-python = ">=3.14"