fix(telemetry): mask the words after a credential word in error_message #1588

templateErrorMessage (packages/opencode/src/altimate/telemetry/error-detail.ts) keeps only words from a fixed error vocabulary and replaces the rest with <x>. Credential words such as password and token are left out of the vocabulary, so they become <x>, but the words after them are kept whenever they happen to be vocabulary words:

• templateErrorMessage("password is connection refused") → "<x> is connection refused"
• templateErrorMessage("password=wrong user") → "<x> wrong user"

So a credential made only of common error words would reach telemetry. The risk is small (real secrets are rarely dictionary words), but a rule that masks everything after a credential word on the line would close it.

Found during the v0.12.8 release PR review. Deferred because: it changes the telemetry template and needs its own tests.