docs: add ?consumer= query param to all connection URLs

[klappy]

All oddkit connection URLs in README.md and docs/CLAUDE-CODE.md now include the optional ?consumer=yourname query parameter for telemetry self-identification.

Changes:

• Added explanatory paragraph in README describing the ?consumer= parameter
• Updated all 5 connection URLs in README.md to include ?consumer=yourname
• Updated the connection URL in docs/CLAUDE-CODE.md to include ?consumer=yourname

Companion PRs:

• feat: add ?consumer= query param to getting started URLs and telemetry governance klappy.dev#96 (getting started article)
• feat: add ?consumer= query param as highest-priority consumer identification #92 (server-side implementation)

---

Note

Low Risk
Documentation-only change that updates example MCP server URLs to include an optional ?consumer=yourname identifier; no runtime or security-sensitive code is modified.

Overview
Adds a short explanation in README.md for the optional ?consumer=yourname query parameter (used to self-identify on the transparency leaderboard).

Updates all documented MCP connection URLs in README.md and docs/CLAUDE-CODE.md to include ?consumer=yourname in the examples.

^{Reviewed by Cursor Bugbot for commit 347dd89. Bugbot is set up for automated code reviews on this repo. Configure here.}