chore(skills): add dev-cycle profile and switch docs to counter-prefix naming

Activate the skills plugin for this project with a project profile at
.claude/dev-cycle-profile.yml: server-focused inner-loop build/test,
scripts/check.sh as the audit regression gate, and the Gitea tracker
wired as the boss forward queue.

Set the naming policy to stable_per_directory_4digit (0001-slug.md) for
docs/specs and docs/plans, and rename the existing date-prefixed
artefacts to match. The one internal spec cross-link is updated.

docs/plans/0001-watch-multi-profile.md

@@ -8,7 +8,7 @@
 
 **Tech Stack:** Bash (zero new deps), Gradle/Kotlin DSL, Kotlin/Compose for the optional dev badge, Android manifest placeholders.
 
-**Spec:** [docs/specs/2026-05-20-watch-multi-profile-design.md](../specs/2026-05-20-watch-multi-profile-design.md)
+**Spec:** [docs/specs/0001-watch-multi-profile-design.md](../specs/0001-watch-multi-profile-design.md)
 
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