feat: slice 1 - the neckbeard framework chain runs end to end

Tracer bullet of the migration design (Gate 4, slice 1): pinned v0.1.1
baseline under docs/sources/upstream/ with provenance note, the
Karpathy block moved verbatim to docs/sources/regelwerk/ (standing
rule mapped onto the sources read-only mechanism), AGENTS.md assembled
from the byte-true upstream sections plus the project section 6
(group rules condensed from the old CLAUDE.md), CLAUDE.md reduced to
the upstream pointer, WORKFLOW.md and all four templates copied,
schema.yaml extended (issue milestone/priority/status columns,
component type, wiki area vision - all flagged in the header),
validate.py and gen_status.py forked with marked extensions,
pruefe_upstream_drift.py added, STATUS.md generated, CI gains the
offline validate job, README directory link defused.

Verified: validate 0 errors 0 warnings (the three pre-existing
directory-link errors are gone), gen_status --check current,
drift check 0 findings, baseline byte-identical to the reference
checkout (10/10 files), four negative tests fire (WIP limit 3x
in-progress, waiting without wartegrund, component slug mismatch,
single-byte drift in WORKFLOW.md). gen_status needs Python >= 3.10
locally (write_text newline) - noted for the design AAR.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/issues/template.md

@@ -0,0 +1,29 @@
+---
+type: issue
+id: "0000"
+status: open            # open | in-progress | done | rejected
+created: YYYY-MM-DD
+related: []             # design docs, ADRs, other issues
+---
+
+<!-- Copy to docs/issues/NNNN-slug.md. Delete comments when filling in. -->
+
+# Issue-0000: Title
+
+## Problem / Motivation
+
+<!-- What's wrong or missing, and why it matters. One paragraph. -->
+
+## Acceptance
+
+<!-- When is this issue done? Verifiable, like every other criterion
+     in this framework. -->
+
+## Notes
+
+<!-- Optional: context, links, findings gathered along the way.
+     Rules: status is the single source of truth and lives here in the
+     frontmatter — STATUS.md is generated, never edited. An issue that
+     starts real work links its design doc in `related`. Closed means
+     status: done (or rejected, with a one-line reason in Notes) —
+     the file stays; git is the history. -->