Feature/spoolman card uid

[Rocka84]

Summary

This PR completely migrates tag lookup and spool association from relying on legacy fields like lot_nr or SPOOL_ID to utilizing the physical NFC Tag UID (hardware_uid mapped to CARD_UID). This provides a much cleaner, robust, and native way to track physical spools.

It introduces the following major changes:

• Snapmaker U1 Webhook Update: Sends CARD_UID directly to the filament_detect/set webhook for the SpoolLink agent during spool loading.
• Auto-Population of UIDs on Manual Load: If a spool is selected manually from the Spoolman list on the display (without an active NFC scan), the first associated card_uid of that spool is automatically loaded and transmitted to the printer.
• Interactive "Link Spool" UI: Scanning an unlinked, empty NFC tag now displays a "Link Spool" button. Clicking this opens the Spoolman list, and selecting a spool immediately associates the tag's hardware_uid with that spool in Spoolman (appending it to extra.card_uids).
• Auto-Migration & Fallbacks: The display will automatically fetch Spoolman data upon scanning any physical tag. If it resolves the tag, it will display the correct spool_id. It also supports comma-separated values for multiple tags per spool and auto-appends to the list if migration is needed.
• Vanilla Spoolman Compatibility: Implements an automatic client-side pagination fallback mechanism. If the Spoolman instance does not support filtering by extra fields (i.e., vanilla Spoolman without PR #904), the ESP32 will automatically fetch spools in chunks and resolve the UID locally, ensuring full compatibility without requiring users to run custom forks.
• Removed Legacy Hacks: The workarounds generating fake lot_nr identifiers for proprietary Bambu Lab and Snapmaker tags have been completely removed. These tags now natively match via their physical hardware_uid or via the legacy lot_nr fallback if they were saved in the old format.
• UI Adjustments: Adds a read-only Card UID field to the extended info view so users can easily read the hardware UID.

⚠️ Dependencies & Notes

This PR cannot be merged yet, as it relies on an unmerged upstream feature. It is currently waiting for SnapmakerU1-Extended-Firmware PR #491 which introduces the SpoolLink agent and changes the spool mapping format to use CARD_UID.

Note on Spoolman: We no longer block on Spoolman PR #904 because we implemented a local pagination fallback for vanilla Spoolman instances. Once PR #904 is merged, the fallback code may be removed.