Reports - csv column headers change order based on date

[Ben-in-Chicago]

Describe the bug
When exporting csv from the Reports -> Routing menu, the order of the columns in the csv file will change based on month/year selected. For example, selecting June 2024, the column headers are in this order:

timestamp
chan_id_in
chan_id_out
amt_in
amt_out
fee
fee_msat
amt_in_msat
amt_out_msat
timestamp_ns
peer_alias_in
peer_alias_out
alias_in
alias_out

When selecting a more recent month, like November 2025, the columns order change to:

timestamp
chan_id_in
chan_id_out
amt_in
amt_out
fee
fee_msat
amt_in_msat
amt_out_msat
timestamp_ns
peer_alias_in
peer_alias_out
incoming_htlc_id
outgoing_htlc_id
alias_out
alias_in

It seems that when the incoming_htlc_id and outgoing_htlc_id columns were added, the alias_in and alias_out columns were switched.

To Reproduce
Steps to reproduce the behavior:

1. Go to Reports
2. Click on Routes (select a month from different years)
3. Scroll down to Export CSV
4. See differences

Screenshots
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Your environment

• Version of RTL: 0.15.6 beta
• Version of lnd/core lightning/eclair: LND 0.20.0-beta
• Version of btcd, bitcoind, or other backend
• Browser & browser version: Chrome
• Operating system (uname -a on *Nix): UmbrelOS
• any other relevant environment details

Additional context
Add any other context about the problem here.