Add rates for materials even if not currently used

Give every material a rate so that any material a designer later uses is not passed to the client without a price.

1. If a designer later uses a material that has no rate, it will effectively be passed to the client without a price.

   ✓ ଅକ୍ଟୋବର 16, 2026 ରେ ପ୍ରଡକ୍ଟରେ ଯାଞ୍ଚ କରାଯାଇଛି