fix(tui): redact Telegram bot tokens in doctor reports

[9s5bz2jvd2-lang]

Summary

• redact high-confidence Telegram bot-token shapes before TUI doctor-report artifacts are saved
• record the new redaction rule in redaction.json
• cover all three saved artifacts, adjacent tokens, the redaction marker, near misses, and existing behavior
• explicitly cover 13–16 digit near misses plus tokens at string start, after a quote, and after a newline

The rule is intentionally conservative: 6–12 decimal digits, a colon, and at least 30 ASCII characters from [A-Za-z0-9_-]. It matches the existing LingTai kernel trajectory-redaction heuristic; it is a high-confidence redaction boundary, not a claim that 12 digits is Telegram's protocol maximum. The 13–16 digit cases are therefore locked as preserved near misses.

Validation

• go test ./internal/doctorreport -count=1
• go test ./internal/tui -count=1
• go test ./... -count=1
• go vet ./...
• git diff --check