0.7.3

Fixed

• M-03 "Word Movement" was unsolvable without guessing. The mission asks you to replace
  three surveillance codes, but neither the briefing nor the transmission said what to replace
  them with (SCAN-7741 → UNIT-7741, TRACE-3392 → RELAY-3392, WATCH-0012 →
  NODE-0012). The briefing now names them, as it already did for comparable missions. Fixed
  upstream in the content monorepo and re-vendored; a new token-level invariant test there
  makes this class of defect fail the content gate instead of reaching players.

Added

• German README (README.de.md) with a language switcher in both files, plus a community-store
  downloads badge.
• CONTRIBUTING.md, SECURITY.md, LICENSING.md, CLA.md and LICENSE-DOCS. SECURITY.md
  documents the threat model in full: mission-folder file access, the scope of keystroke
  recording, what CIPHER transmits and to whom, and plaintext API-key storage.

Changed

• README: all repo-internal links are now absolute, since the community plugin directory
  renders the README without repo-root context and relative links break there. Requirements
  point at the central local-LLM setup guide instead of repeating server setup.