[feature] Allow balance querying at specified block height

[joel-u410]

Describe your changes

This adds an Option argument to get_token_balance which permits querying for balances at specific block heights. Additionally, this feature is implemented for the namadac CLI via the --height argument.

This is needed for accounting / auditing purposes and for some upcoming enhancements I will be contributing to namada-indexer.

This is a breaking change to the client SDK only. (The node RPC already supports this option)

Example:

# Query balance with unspecified height (same as existing behavior)
$ ./target/debug/namadac balance \
        --node https://rpc.namada.tududes.com:443 \
        --chain-id tududes-test.81efb06d86523ae4f \
        --token tnam1q87wtaqqtlwkw927gaff34hgda36huk0kgry692a \
        --owner tnam1qrcqrpj8r8lv6632wcwv9j0r6pp4n3xsug9hkxzx
nam: 9588921.2

# Query balance with specific height where a transaction occurred
$ ./target/debug/namadac balance \
        --node https://rpc.namada.tududes.com:443 \
        --chain-id tududes-test.81efb06d86523ae4f \
        --token tnam1q87wtaqqtlwkw927gaff34hgda36huk0kgry692a \
        --owner tnam1qrcqrpj8r8lv6632wcwv9j0r6pp4n3xsug9hkxzx \
        --height 59780
nam: 9590921.25

# Query balance with specific height just before the above transaction
$ ./target/debug/namadac balance \
        --node https://rpc.namada.tududes.com:443 \
        --chain-id tududes-test.81efb06d86523ae4f \
        --token tnam1q87wtaqqtlwkw927gaff34hgda36huk0kgry692a \
        --owner tnam1qrcqrpj8r8lv6632wcwv9j0r6pp4n3xsug9hkxzx \
        --height 59781
nam: 9589921.225

Indicate on which release or other PRs this topic is based on

This is based on the current main branch.

Checklist before merging to draft

• I have added a changelog
• Git history is in acceptable state

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 72.69%. Comparing base (0d7140f) to head (e669abe).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...ates/light_sdk/src/reading/asynchronous/account.rs	0.00%	2 Missing ⚠️
crates/sdk/src/args.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3530   +/-   ##
=======================================
  Coverage   72.68%   72.69%           
=======================================
  Files         338      338           
  Lines      104319   104324    +5     
=======================================
+ Hits        75826    75834    +8     
+ Misses      28493    28490    -3     

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