[routine:apothecary] Provision auto-merge-deps label estate-wide

[JacobPEvans]

Background

The Apothecary cloud routine (in JacobPEvans/claude-code-routines) auto-labels safe dependency PRs with auto-merge-deps so The Conductor can merge them. The gate currently exists in only 2 of 5 sampled repos (nix-darwin, nix-home).

Request

Add auto-merge-deps to this repo's .github/labels.yml so the existing label-sync.yml workflow propagates it to every public repo in the org.

Suggested label spec:

- name: auto-merge-deps
  color: 0e8a16  # green
  description: Pre-cleared by The Apothecary for auto-merge by The Conductor

Why now

Without estate-wide provisioning, Apothecary escalates via Slack for repos lacking the label (instead of auto-labeling). PR #20 in claude-code-routines hardens Apothecary's gate but cannot create the label inline — provisioning is correctly out-of-band.

Provenance

• Filed by: Routine rewrite implementation (PR feat(routines): rewrite six new routines, ground-truthed and hardened dryvist/claude-code-routines#20).
• Why this issue: Follow-up Epic: Centralize shared configurations across all repositories #1 from the PR plan.
• Label: cloud-routine (apply if available in this repo)