ci: source pipeline profile in build jobs (main → stable refs)

Load stack config only sourced lpb.stack.env (dev defaults:
PI_REF=lpb-dev, CONFIG_REF=dev), so the main pipeline was building
stable images from dev branches. The profile files
(lpb.stack.dev.env / lpb.stack.main.env) existed but were never used.

This release (0.0.52-lpb) is unaffected: pi lpb == lpb-dev and config
main == dev at promote time, so stable image content was correct.
Without this fix, the next release would silently ship dev content
into :main / :latest images.

Author: localpibox

.github/workflows/build-and-publish.yml

@@ -156,6 +156,11 @@ jobs:
         run: |
           set -a
           source lpb.stack.env
+          # Pipeline profile: main builds stable branches (lpb/main), dev builds lpb-dev/dev
+          case "${GITHUB_REF_NAME}" in
+            main) [ -f lpb.stack.main.env ] && source lpb.stack.main.env ;;
+            dev)  [ -f lpb.stack.dev.env ]  && source lpb.stack.dev.env ;;
+          esac
           set +a
           echo "PI_FORK=$LPB_PI_FORK" >> "$GITHUB_OUTPUT"
           # Use branch name for cloning (not version tag, which doesn't exist yet)
@@ -235,6 +240,11 @@ jobs:
         run: |
           set -a
           source lpb.stack.env
+          # Pipeline profile: main builds stable branches (lpb/main), dev builds lpb-dev/dev
+          case "${GITHUB_REF_NAME}" in
+            main) [ -f lpb.stack.main.env ] && source lpb.stack.main.env ;;
+            dev)  [ -f lpb.stack.dev.env ]  && source lpb.stack.dev.env ;;
+          esac
           set +a
           echo "PI_FORK=$LPB_PI_FORK" >> "$GITHUB_OUTPUT"
           echo "PI_REF=$LPB_PI_REF" >> "$GITHUB_OUTPUT"