chore: refresh agentic workflows to stable gh-aw v0.82.14

Upgrade the gh-aw toolchain from v0.81.6 to the latest stable release
(v0.82.14, not a pre-release) and recompile the existing issue-triage
agentic workflow with `gh aw compile`.

The source workflow (issue-triage.md) is unchanged: frontmatter_hash and
body_hash are identical, and permissions blocks match, so prompts,
triggers, permissions, tools, safe outputs, network, and engine behavior
are preserved. All changes are compiler-generated runtime infrastructure:

- issue-triage.lock.yml: compiler v0.81.6->v0.82.14, engine 1.0.65->1.0.71,
  action/container SHA bumps, new OAuth-token/lockdown steps, dropped
  .crush support, whitespace normalization.
- .github/aw/actions-lock.json: setup action v0.81.6->v0.82.14 (+setup-cli).
- .gitattributes: gh-aw-managed linguist-generated marker for lock files.
- agentics-maintenance.yml: auto-generated companion for the workflow's
  expiring safe outputs (new in v0.82.14).

Validated with `gh aw compile` and `gh aw validate` (0 errors, 0 warnings),
idempotent on re-compile.

Refs github/plan-track-agentic-toolkit#519

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 628d4172-49f6-4d5c-905c-a33276de3aee

Author: alondahari

.gitattributes

@@ -1 +1,3 @@
 .github/actions/*/lib/* linguist-generated
+
+.github/workflows/*.lock.yml linguist-generated=true merge=ours

.github/aw/actions-lock.json

@@ -1,9 +1,14 @@
 {
   "entries": {
-    "github/gh-aw-actions/setup@v0.81.6": {
+    "github/gh-aw-actions/setup-cli@v0.82.14": {
+      "repo": "github/gh-aw-actions/setup-cli",
+      "version": "v0.82.14",
+      "sha": "b6d1443e05b8716267fa19425b99aa4f12006b4a"
+    },
+    "github/gh-aw-actions/setup@v0.82.14": {
       "repo": "github/gh-aw-actions/setup",
-      "version": "v0.81.6",
-      "sha": "ba6380cc6e5be5d21677bebe04d52fb48e3abec7"
+      "version": "v0.82.14",
+      "sha": "b6d1443e05b8716267fa19425b99aa4f12006b4a"
     }
   }
 }