feat: backport Opus 4.7 + adaptive thinking, remove scan tools, add --help to scripts

Backport upstream Shannon PRs #325, #327, #328:

- Update large model default to claude-opus-4-7, add adaptive thinking
  configuration (auto-enabled on Opus 4.6/4.7, opt-out via
  CLAUDE_ADAPTIVE_THINKING=false), filter thinking blocks from message
  content, bump claude-agent-sdk to ^0.2.114
- Remove unused scan tools (nmap, subfinder, whatweb, schemathesis) from
  Dockerfile, prompts, and docs; remove dead 'tool' error type from
  PentestErrorType; redact URLs in preflight info logs
- Add --help flag to save-deliverable and generate-totp CLI scripts

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.claude/commands/debug.md

@@ -135,7 +135,6 @@ shannon <URL> <REPO> --pipeline-testing
 |-------------------|---------|------------|
 | `config` | Configuration file issues | No |
 | `network` | Connection/timeout issues | Yes |
-| `tool` | External tool (nmap, etc.) failed | Yes |
 | `prompt` | Claude SDK/API issues | Sometimes |
 | `filesystem` | File read/write errors | Sometimes |
 | `validation` | Deliverable validation failed | Yes (via retry) |