release(v4.8.3): bump framework and eight skills to 4.8.3 in lockstep; archive PR #46 reviews (two rounds)

Issue #42 stages 1-2: the SKILL.md code-block inventory as test data and
the removal of blocks the entry scripts already do. Merge-workspace review:
round 1 (@8d26106) claude agy grok PASS, codex NOT PASS (R1-R3); fixed in
17eba09 (docs, inventory data and the guard test only); round 2 4/4 PASS.
Full suite at 8d26106 1408 passed / 0 failed. Reports and the round-2
identity sidecars go to .agents/reports/<session>/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff

.agents/reports/reviewer-agy-01/report-e722c7b8.identity.json

@@ -0,0 +1,14 @@
+{
+  "loop_id": "loop-20261003T230658Z-e7866a",
+  "base_sha": "8d26106195a0a24621f140e76389d206332f84c0",
+  "head_sha": "17eba0904ebbf54c1d2243ad61a6f2ba17263889",
+  "tree_sha": "a0f1ffede44be7c86267a56b25871e1d081feafb",
+  "review_commit": "17eba0904ebbf54c1d2243ad61a6f2ba17263889",
+  "reviewer": "reviewer-agy-01",
+  "job_id": "e722c7b8",
+  "verdict": "PASS",
+  "transport": "herdr",
+  "evidence": "review-tree",
+  "isolation": "worktree",
+  "verified_at": "2026-10-03T23:35:18Z"
+}