Creator name printed via spdlog is malformed

[knoepfel]

There is likely a memory overwrite/data race occurring that prevents a reasonable printout of the creator name. For example, in the following terminal printout, the characters following "source:" should be the name of the creator. Most of the time, this value is either empty or malformed, likely indicating accessing stale memory.

⋮
[2025-11-17 17:02:35.946] [debug] [run:0]: 3 @ Mon Nov 17 17:02:35 2025
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000374c000 from source: 
 -> Product name: number
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000374c000 from source: 
 -> Product name: squared_number
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x6000037540c0 from source: 
 -> Product name: number
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x6000037540c0 from source: 
 -> Product name: squared_number
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000375c0c0 from source: 
 -> Product name: number
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000375c0c0 from source: p`
 -> Product name: squared_number
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000375c120 from source: 
 -> Product name: number
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000375c120 from source: `
 -> Product name: squared_number
[2025-11-17 17:02:35.946] [debug] [run:1]: 3.7416573867739413 @ Mon Nov 17 17:02:35 2025
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000375c000 from source: 
 -> Product name: added_data
[2025-11-17 17:02:35.946] [debug] Saving data for store id: 0x60000375c000 from source: 6?
 -> Product name: result
[2025-11-17 17:02:35.946] [debug] Routed 26 messages in 59 microseconds (2.269 microseconds per message)
[2025-11-17 17:02:35.946] [info] 
Processed levels:

  job
   │ 
   └ run: 2
      │ 
      └ event: 10

[greenc-FNAL]

Investigations reveal that the corruption is due to storing a string_view to a temporary in product_store. However it appears that the blank source entries have a different cause.

Continuing to investigate, PR incoming.