The algod_url clap arg was the only override missing an env mapping, so
the compose OPENNODIA_ALGOD_URL was ignored and validation/writes fell
back to localhost:4001 -> public relay. Add the env mapping plus the
compose var; DEX startup validation now passes against the local
participation node.

Also sync the English README roadmap/components with the translated
ones (M6 Connect, M7 Channels), mark M5 done in ko/zh/ja, and refresh
two stale module comments (params.rs, matching.rs).

Sync README (EN/KO/ZH/JA), INSTALL.md, init-secrets scripts, and
docker-compose host-exposed port defaults with the actual port scheme:
opennodia 37080, algod 37001, indexer 37980, vite dev 37173.
Container-internal ports are unchanged.