`deploy` and `install` have different argument syntax

I tried the following:

1. dfx deploy icrc_nft --argument 'record {icrc7_args = null; icrc30_args =null; icrc3_args =null;}'
2. dfx canister install --wasm icrc_nft.wasm --argument 'record {icrc7_args = null; icrc30_args =null; icrc3_args =null;}' r7inp-6aaaa-aaaaa-aaabq-cai

I expected to see this happen: install accepts the same argument

Instead, this happened: install required me to add brackets

error: parser error
  ┌─ Candid argument:1:1
  │
1 │ record {icrc7_args = null; icrc30_args =null; icrc3_args =null;}
  │ ^^^^^^ Unexpected token
  │
  = Expects "("

Error: Failed to install wasm module to canister 'r7inp-6aaaa-aaaaa-aaabq-cai'.
Caused by: Failed to install wasm module to canister 'r7inp-6aaaa-aaaaa-aaabq-cai'.
  Failed to create argument blob.
    Invalid argument: Invalid Candid values: Candid parser error: Unrecognized token `Record` found at 0:6
Expected one of "("

Meta

dfx --version:

dfx 0.15.2

<log output>

Reproduce the two commands shown in the issue, comparing dfx deploy with dfx canister install and their handling of the Candid argument. Trace the argument-parsing entry points for both commands. Done means install accepts the same argument syntax as deploy, with the reported parser error covered by verification.