Consistency: Update remaining hardcoded 'fees' references to 'fee'

[coderabbitai]

Description

Following the plugin type rename from 'fees' to 'fee' in PR #117, several hardcoded references to the old plugin type remain in the codebase and need to be updated for consistency.

Files and Changes Required

Based on CodeRabbit's analysis, the following files need updates:

plugin/fees/config.go

• Change "type": "fees" → "type": "fee"
• Change v.SetEnvPrefix("FEES") → v.SetEnvPrefix("FEE")

plugin/fees/fees.go

• Change logger.WithField("plugin", "fees") → logger.WithField("plugin", PLUGIN_TYPE)

scripts/dev/create_fee_policy/main.go

• Update PluginID: vtypes.PluginVultisigFees_feee, to use the new vtypes constant reflecting the "fee" plugin

plugin/fees/policy.go & plugin/fees/fees.go

• Replace references to vtypes.PluginVultisigFees_feee with the correctly renamed vtypes constant (e.g., vtypes.PluginVultisigFee_fee)

Context

This consistency exercise ensures that all references to the plugin type are aligned with the rename performed in PR #117 where PLUGIN_TYPE was changed from "fees" to "fee" in plugin/fees/constraints.go.

References

• PR: ⚡️ Tidied up config. Moved validation and recipe specs to policy.go #117
• Comment: ⚡️ Tidied up config. Moved validation and recipe specs to policy.go #117 (comment)