chore: improve wallet recovery log message

[hansieodendaal]

Description

Improved the wallet recovery log message:

2025-02-06 09:02:50.398360400 [wallet::utxo_scanning] INFO  Fresh wallet recovery/scanning: Wallet birthday 
'1124' at epoch time '1738108800' with block height '81', scanning from epoch time '1736899200' at block height 
'0' with header hash '68bb2afefbaf579aefcce9a7160c3e503177857df36c7885b1d3af054e253330'

Motivation and Context

When a user sees an info message about recovery, this message will make it clear what the birthday is and what the starting scan height is.

See #6787.

How Has This Been Tested?

System-level testing

What process can a PR reviewer use to test or verify this change?

Code review

Breaking Changes

• None
• Requires data directory on base node to be deleted
• Requires hard fork
• Other - Please specify

[github-actions]

Test Results (CI)

    3 files    129 suites   38m 34s ⏱️
1 361 tests 1 361 ✅ 0 💤 0 ❌
4 081 runs  4 081 ✅ 0 💤 0 ❌

Results for commit 1b67395.

[github-actions]

Test Results (Integration tests)

 2 files  + 2  11 suites  +11   50m 6s ⏱️ + 50m 6s
36 tests +36  35 ✅ +35  0 💤 ±0  1 ❌ +1 
38 runs  +38  35 ✅ +35  0 💤 ±0  3 ❌ +3 

For more details on these failures, see this check.

Results for commit 1b67395. ± Comparison against base commit 5a562a5.