fix(mdns): Fix unused variable dcst warning for wifi-remote chips (IDFGH-16787)

[vikramdattu]

Description

Fix mdns.c dcst variable not used warning for ESP32-P4 and other non-native Wi-Fi devices

• Cover WIFI_REMOTE as well for MDNS_ESP_WIFI_ENABLED macro
• localize esp_netif_dhcp_status_t dcst; declaration where used
• Bumped patch version for mdns component

Testing

Tried with ESP RainMaker example on ESP32-P4

• Build warning is not seen anymore and the device is discoverable

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

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Note

Expand MDNS_ESP_WIFI_ENABLED to cover CONFIG_ESP_WIFI_REMOTE_ENABLED and move dcst declarations into specific Wi‑Fi/Ethernet event branches to fix unused-variable warnings.

• mDNS core (components/mdns/mdns.c):
  • Update macro: MDNS_ESP_WIFI_ENABLED now checks (CONFIG_ESP_WIFI_ENABLED || CONFIG_ESP_WIFI_REMOTE_ENABLED).
  • Event handling:
    • WIFI events: declare esp_netif_dhcp_status_t dcst inside WIFI_EVENT branch.
    • ETH events: declare esp_netif_dhcp_status_t dcst inside ETH_EVENT branch.
  • Minor preprocessor/indentation adjustments around event handlers.

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[CLAassistant]

All committers have signed the CLA.

[vikramdattu]

cc @david-cermak

[david-cermak]

LGTM, just some formal issue with our release process.

If you prefer, just remove the change in idf_component.yml and we can merge it immediately. I'll then handle the release process.

[david-cermak]

LGTM!

There's a minor formatting issue (and fuzzer docker image issue), but since I'm tagging the version afterwards, I'll fix all that in #944.

Thank you @vikramdattu for the fix!