insufficient cost recovery for InstallBundle message handling

[dckc]

Describe the bug

The InstallBundle message results in more or less permanent storage of the bundle, but we currently only charge as though it were a large message to be consumed.

agoric-sdk/golang/cosmos/x/swingset/keeper/msg_server.go

Line 160 in 563809d

func (keeper msgServer) InstallBundle(goCtx context.Context, msg *types.MsgInstallBundle) (*types.MsgInstallBundleResponse, error) {

To Reproduce

IOU some experimental data on current charging rates

Expected behavior

IOU some economic justification of how much is enough. The cost should be subject to governance.

Additional context

The design in #4396 included:

The fees to be charged need to be configurable.

#6049 adds charging admission fees on MsgWalletSpendAction but not on MsgInstallBundle.

cc @michaelfig @JimLarson @kriskowal

[dckc]

@warner any thoughts on how much is "enough"? Should this be a separate dimension from all these?

	BeansPerInboundTx         = "inboundTx"
	BeansPerBlockComputeLimit = "blockComputeLimit"
	BeansPerMessage           = "message"
	BeansPerMessageByte       = "messageByte"
	BeansPerMinFeeDebit       = "minFeeDebit"
	BeansPerVatCreation       = "vatCreation"
	BeansPerXsnapComputron    = "xsnapComputron"