docs: strengthen collaboration governance and AGENTS engineering protocol (#263)

* docs: harden collaboration policy and review automation

* ci(docs): remove unsupported lychee --exclude-mail flag

* docs(governance): reduce automation side-effects and tighten risk controls

* docs(governance): add backlog pruning and supersede protocol

* docs(agents): codify engineering principles and risk-tier workflow

* docs(readme): add centered star history section at bottom

* docs(agents): enforce privacy-safe and neutral test wording

* docs(governance): enforce privacy-safe and neutral collaboration checks

* fix(ci): satisfy rustfmt and discord schema test fields

* docs(governance): require ZeroClaw-native identity wording

* docs(agents): add ZeroClaw identity-safe naming palette

* docs(governance): codify code naming and architecture contracts

* docs(contributing): add naming and architecture good/bad examples

* docs(pr): reduce checkbox TODOs and shift to label-first metadata

* docs(pr): remove duplicate collaboration track field

* ci(labeler): auto-derive module labels and expand provider hints

* ci(labeler): auto-apply trusted contributor on PRs and issues

* fix(ci): apply rustfmt updates from latest main

* ci(labels): flatten namespaces and add contributor tiers

* chore: drop stale rustfmt-only drift

* ci: scope Rust and docs checks by change set

* ci: exclude non-markdown docs from docs-quality targets

* ci: satisfy actionlint shellcheck output style

* ci(labels): auto-correct manual contributor tier edits

* ci(labeler): auto-correct risk label edits

* ci(labeler): auto-correct size label edits

---------

Co-authored-by: Chummy <183474434+chumyin@users.noreply.github.com>

.github/dependabot.yml

@@ -0,0 +1,35 @@
+version: 2
+
+updates:
+  - package-ecosystem: cargo
+    directory: "/"
+    schedule:
+      interval: weekly
+    target-branch: main
+    open-pull-requests-limit: 5
+    labels:
+      - "dependencies"
+    groups:
+      rust-minor-patch:
+        patterns:
+          - "*"
+        update-types:
+          - minor
+          - patch
+
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+    target-branch: main
+    open-pull-requests-limit: 3
+    labels:
+      - "ci"
+      - "dependencies"
+    groups:
+      actions-minor-patch:
+        patterns:
+          - "*"
+        update-types:
+          - minor
+          - patch