Rewire: consume valar-core + scheduling as remote packages (verify branch)

Prove-out of the shared-core rewire for Glasscalibur (not for merge yet).
firmware/esphome/Glasscalibur.yml pulls valar-core + scheduling from
Valar-Systems/valar-motion (pinned v0.2.0) + firmware/common/glasscalibur-product.yaml
(window cover, limit switches, LIS2DH12 tamper/vibration, buzzer, trip counters,
schedule_open/close contract). Shared entities renamed via !extend to preserve
HA entity_ids; Button 2 hidden (internal) since this board has 2 buttons; the
board's real rsense (220 mOhm) + motion + gated on_stall restored via !extend
on the shared driver.

Regression gate (esphome config): 0 entity regressions (all 50 preserved),
OTA button URL byte-identical (Glasscalibur, self-updating from its own repo).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XpCz2RvuxV5uV8bFwCEpkL

Author: claude

.github/workflows/verify-rewire.yml

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+# Verification build for the valar-core rewire branch. Compiles the rewired
+# Glasscalibur config (which pulls valar-core + scheduling from valar-motion as
+# remote packages) on GitHub runners and uploads factory/ota bins so a board can
+# be flashed for testing. Not a release.
+name: Verify rewire build
+
+on:
+  push:
+    branches: ['rewire/valar-core']
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Install ESPHome
+        run: pip install esphome
+      - name: Compile Glasscalibur
+        run: esphome compile firmware/esphome/Glasscalibur.yml
+      - name: Collect binaries + md5
+        run: |
+          mkdir -p dist
+          F=$(find . -path "*/.pioenvs/*/firmware.factory.bin" | head -1)
+          O=$(find . -path "*/.pioenvs/*/firmware.ota.bin" | head -1)
+          cp "$F" dist/Glasscalibur.factory.bin
+          cp "$O" dist/Glasscalibur.ota.bin
+          md5sum dist/Glasscalibur.ota.bin | cut -d' ' -f1 > dist/Glasscalibur.ota.bin.md5
+      - uses: actions/upload-artifact@v4
+        with:
+          name: Glasscalibur
+          path: dist/*

.gitignore

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+secrets.yaml