workflow: replace per-iter journal system with git log + BLOCKED.md

The per-iter journal under docs/journals/ duplicated the iter commit
body's substance and accumulated as Verlauf-Doku with no Future-Use.
Sweep across all live control documents: CLAUDE.md, the 7 SKILL.md
files, the 11 agent files, design/INDEX.md and the contracts/models
that referenced journals, docs/roadmap.md, and the handful of source
comments + tests that pointed at journal files for rationale.

Mechanism changes:
- Standing-reading-lists in every agent now read `git log -N --format=full`
  for recent project state, never per-iter journal files. The architect
  reads `git log <prev-milestone-close>..HEAD --format=full` for audit
  scope.
- implement-orchestrator no longer writes a journal file. DONE outcomes
  emit just code + stats; the end-report is the per-task summary the
  Boss uses to write the commit body. PARTIAL/BLOCKED outcomes emit
  BLOCKED.md at the repo root — uncommitted by convention, Boss removes
  on repair or discard. New iron-law line + four-rationalisation row
  + red-flag bullet codify it.
- audit ratify mechanic: --update-baseline is now paired with an explicit
  ratify paragraph in the audit-close commit body, not a separate
  JOURNAL ratify entry.
- design/contracts/honesty-rule.md: "history and rationale lives in
  docs/journals/" → "lives in git log (iter and audit commit bodies)".
  Pinned phrase preserved verbatim.
- CLAUDE.md "Roles of …" section reframed: design/, git log,
  journal-archive.md (content-frozen), roadmap.md, specs/, plans/.
  No docs/journals/ slot anymore.
- roadmap.md context-lines that pointed at per-iter journals are
  dropped where the spec/commit already carries the rationale, or
  rephrased to "shipped in the <iter> iter commit" / "docs/journal-
  archive.md (<date> entry)" for pre-2026-05-11 references.

What stays (this commit):
- docs/journals/ directory and contents are NOT touched. Removing the
  contents is a separate follow-up.
- docs/journals/2026-05-19-design-decision-records.md still has live
  readers (docs_honesty_pin.rs Z 108 + parse.rs + duplicate_ctor_pin.rs
  + 3 roadmap mentions) — also follow-up.
- docs/journal-archive.md still exists; its self-pointer header has
  been updated to drop the "see docs/journals/INDEX.md" mention.

Workspace builds, full test suite green.

design/INDEX.md

@@ -56,11 +56,11 @@ evolving in lockstep with the language:
   sole addressable spine for canonical state), `design/contracts/`
   (test-linked invariants), `design/models/` (onboarding
   whitepapers).
-- **Docs** (`docs/`): `docs/journals/` (per-iter decisions log; see
-  `INDEX.md`), `docs/journal-archive.md` (archived monolith for
-  pre-2026-05-11 history), `roadmap.md` (forward queue), `specs/`
-  (per-milestone design specs), `plans/` (per-iteration
-  implementation plans).
+- **Docs** (`docs/`): `docs/journal-archive.md` (archived monolith
+  for pre-2026-05-11 history, content-frozen), `roadmap.md` (forward
+  queue), `specs/` (per-milestone design specs), `plans/` (per-
+  iteration implementation plans). Current iter / audit history
+  lives in `git log`.
 - **Tests**: unit tests per crate plus E2E in `crates/ail/tests/e2e.rs`. Every
   new compiler path needs a test, otherwise the feature does not count as done.
 
@@ -68,7 +68,7 @@ evolving in lockstep with the language:
 ### Project language: English
 
 All in-tree content is written in English: source code (identifiers,
-comments, string literals, CLI help), design documents, the journal, agent
+comments, string literals, CLI help), design documents, agent
 prompts, READMEs, commit messages, examples, and `CLAUDE.md`. The live
 conversation between user and me stays German for ergonomic reasons;
 everything that lands in git is English. This keeps diffs and tooling output