docs: track 0.15.3, which is what pip install now gives you

[fas89]

data-product-forge v0.15.3 is on PyPI (26 releases). The pin follows it — never the other way round, because cli-consistency.yml runs pip install data-product-forge==<pin> on every PR.

Why there was a second patch in one day

0.15.2 removed the documentation links that went nowhere. It left nineteen that went somewhere:

docs.fluid.io resolves, returns 200, and serves "Contracts Overview | Fluid Technical Docs — Financial system of the future" — an unrelated fintech. fluid validate printed it into its own error output:

  ❌ Unknown provider 'redshift'
  📚 Docs: https://docs.fluid.io/providers

A dead host announces itself. A live one sharing our product word does not.

18 references, 15 files, all named by the gate

check_cli_docs.py listed every one — the repo-root README, the landing banner and its pip install line, vision.md, four provider baseline banners, two walkthrough banners, the CLI and providers index lines, getting-started's pin and tracking sentence, cli/mission.md, and two sdk-and-plugins/reference exact-pin examples.

One 0.15.2 is deliberately kept, on the landing page, in the sentence naming the patch releases with no notes page of their own. It now names all three and says what they were for. History is not rewritten to match today.

Verified

check_cli_docs.py   OK: fluid CLI version matches docs (0.15.3)
                    OK: all 1093 documented `fluid` invocations match the pinned CLI
                    OK: every version claim in docs/ agrees with the pin (CLI 0.15.3)
npm run docs:build  exit 0
check-dist-links    Clean, canaries passing