fix: provision the requested ESP32 SDK before skeleton reuse

[zackees]

Fixes the ESP32-C2 CI failure where a complete SDK for a different MCU caused fbuild to skip the shared libs archive, leaving the C2 skeleton without its required FreeRTOS headers. SDK completion is now checked for the requested MCU.\n\nValidation: git diff --check. The focused Rust tests were started but exceeded the five-minute cold dependency build cap with no compiler/test failures; the ESP32-C2 workflow is the end-to-end acceptance check.

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📥 Commits

Reviewing files that changed from the base of the PR and between 29b29a9 and bda99b2.

📒 Files selected for processing (2)

• crates/fbuild-build-esp/src/esp32/orchestrator/packages.rs
• crates/fbuild-library/src/library/esp32_framework/libs.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/esp32c2-freertos-skeleton

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