v1.57.4.0 refactor(ethos): rename Boil the Lake principle to Boil the Ocean

[garrytan]

Summary

Renames the completeness principle from Boil the Lake to Boil the Ocean
across the whole repo, matching Garry's "Boil the Oceans" post. The metaphor is
reframed so the ocean is the complete destination and lakes are the boilable units
you ship on the way there. Guidance is identical, text only, no runtime behavior change.

This resolves an existing split: the scope_appetite psychographic, the archetypes,
and the completeness intro link already used "boil the ocean" as the good
complete-implementation pole, while the named principle still said "lake."

Incorporates the rename proposed in #1865 by @mvanhorn, with my own edits to the
framing, the resolver sources, tests, and golden fixtures.

What changed

• ETHOS.md §1 renamed + reframed; CLAUDE.md and README.md references updated.
• Preamble resolver sources updated (generate-completeness-section.ts, the
  composition.ts skip-list, generate-lake-intro.ts); every SKILL.md regenerated.
• Unit assertions (skill-validation, terse-build) and the three ship golden
  fixtures updated to the new header.
• Net diff vs base is purely the rename (verified: no non-rename, non-prose lines).

Tests

• Free gate (bun test): PASS (exit 0, 0 failures), re-run after each merge and
  after the version bump.
• Full paid suite (E2E + LLM-judge), per request: 145/147 selected tests PASS.
• 2 failures, both proven pre-existing on main (not this change):
  • document-release/SKILL.md workflow (LLM-judge) — fails identically on main's
    content (scores c:3 c:2 a:3). LLM-judge threshold on the document-release skill.
  • context-save-list-current-branch (E2E) — fails identically on main's content
    (hidesAlpha: gstack-context list shows other branches' saves instead of
    filtering to current). Pre-existing branch-filter bug, unrelated to the rename.
  • Receipts: both were re-run against origin/main's version of the relevant files
    and failed the same way.

Pre-existing issues worth a separate fix (flagging, not fixing here)

• gstack-context list does not filter to the current branch by default
  (context-save-list-current-branch). Real functional bug, out of scope for a rename.
• document-release/SKILL.md workflow scores below the judge threshold.

Version: v1.57.4.0

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[github-actions]

E2E Evals: ❌ FAIL

65/68 tests passed | $11.92 total cost | 12 parallel runners

Suite	Result	Status	Cost
e2e-browse	4/4	✅	$0.19
e2e-deploy	6/6	✅	$1.35
e2e-design	4/4	✅	$0.72
e2e-plan	8/8	✅	$2.55
e2e-qa-workflow	3/3	✅	$1.28
e2e-review	6/6	✅	$2.24
e2e-workflow	3/3	✅	$0.52
llm-judge	23/26	❌	$0.52
e2e-plan	8/8	✅	$2.55

---

12x ubicloud-standard-8 (Docker: pre-baked toolchain + deps) | wall clock ≈ slowest suite

Failures

• ❌ document-release/SKILL.md workflow: unknown
• ❌ document-release/SKILL.md workflow: unknown
• ❌ document-release/SKILL.md workflow: unknown