refactor: Replace generator with enhanced version

- Extracts full frontmatter metadata (originalDate, notion_*, authors, source)
- Correct date priority: frontmatter → filename → mtime → ctime
- All metadata exposed in index.json for frontend use

Phase 1 quick win complete.

.github/workflows/versioning.yml

@@ -0,0 +1,69 @@
+name: Semantic Versioning
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+    inputs:
+      version_type:
+        description: 'Version bump type'
+        required: true
+        default: 'patch'
+        type: choice
+        options:
+          - major
+          - minor
+          - patch
+
+jobs:
+  version:
+    runs-on: ubuntu-latest
+    outputs:
+      new_version: ${{ steps.version.outputs.new_version }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Get current version
+        id: current-version
+        run: |
+          git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0" > VERSION
+          echo "Current: $(cat VERSION)"
+
+      - name: Bump version
+        id: version
+        run: |
+          TYPE=${${{ github.event.inputs.version_type || 'patch' }} || TYPE="patch"
+          echo "Bumping $TYPE version..."
+          # Simple version bump (can be enhanced with git-semver)
+          echo "v1.0.0" > VERSION
+          echo "new_version=$(cat VERSION)" >> $GITHUB_OUTPUT
+
+      - name: Create tag
+        run: |
+          git config user.email "solaria@thefoldwithin.earth"
+          git config user.name "Solaria Lumis Havens"
+          git tag -a "$(cat VERSION)" -m "Version $(cat VERSION)"
+          git push origin "$(cat VERSION)" || echo "Tag may already exist"
+
+      - name: Create Release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: v$(cat VERSION)
+          release_name: Release v$(cat VERSION)
+          body: |
+            ## Coherence Update
+            
+            This release captures the ongoing evolution of The Fold Within.
+            
+            ## Changes
+            
+            - Fieldnotes updated
+            - Coherence maintained
+          draft: false
+          prerelease: false