docs: reframe README opener around the human+agent audience (#99)

* docs: reframe README opener around the human+agent audience (#90)

The previous opener led with what the harness is (a coding harness for
Python+React) and folded the audience into a trailing clause. The new
opener leads with who it's for — teams pairing AI agents with human
engineers — and keeps the mechanism punchline ("every gate enforced
mechanically in CI, not by discipline") that makes the harness story
distinctive.

Wording matches the repo's GitHub description for consistency between
the two surfaces.

Closes #90

* 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)
 
-> A production-quality coding harness for Python (FastAPI) + Vite/React/TypeScript projects. Designed for LLM-driven development: every gate — lint, types, architecture, security, eval — is enforced mechanically so code quality stays consistent across many human and AI contributors.
+> 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"