fix: add missing NoteHistory migration, fix manifest 403, add API error logging

- Commit untracked 20260428150000_add_note_history migration (creates
  NoteHistory table + noteHistory column) that was causing 500s in prod
- Exclude static files (.json, .svg, .ico, etc.) from auth middleware
  to fix manifest.json 403
- Add console.error to echo API routes for production debug visibility

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

memento-note/app/api/ai/echo/connections/route.ts

@@ -77,6 +77,7 @@ export async function GET(req: NextRequest) {
     })
 
   } catch (error) {
+    console.error('[/api/ai/echo/connections] error:', error)
     return NextResponse.json(
       { error: 'Failed to fetch connections' },
       { status: 500 }

memento-note/app/api/ai/echo/route.ts

@@ -32,6 +32,7 @@ export async function GET(req: NextRequest) {
     return NextResponse.json({ insight })
 
   } catch (error) {
+    console.error('[/api/ai/echo] GET error:', error)
     return NextResponse.json(
       { error: 'Failed to fetch Memory Echo insight' },
       { status: 500 }
@@ -84,6 +85,7 @@ export async function POST(req: NextRequest) {
     }
 
   } catch (error) {
+    console.error('[/api/ai/echo] POST error:', error)
     return NextResponse.json(
       { error: 'Failed to process request' },
       { status: 500 }