docs(work): archive shipped template epics and PRDs

Move the 8 shipped template epics and their 9 PRDs (incl.
coverage-architecture) to docs/work/archive/{epics,prds}/ so dispatch
context and prioritization only see live Veect work. The state builder
already walks docs/work/epics/ + docs/work/prds/ only; the one work-CLI
script that matched archive paths (bump-updated-timestamps.mjs, staged
docs/work/**/*.md) now excludes docs/work/archive/ so archived content
stays byte-identical.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

scripts/work/bump-updated-timestamps.mjs

@@ -31,6 +31,7 @@ function stagedWorkDocs() {
     .filter(
       (p) =>
         p.startsWith("docs/work/") &&
+        !p.startsWith("docs/work/archive/") &&
         p.endsWith(".md") &&
         !p.endsWith("README.md"),
     );