feat(build): preserve framework caches on clean

[zackees]

Summary

• keep content-addressed ESP32 core and built-in-library artifacts across \build build --clean\ and \build deploy --clean`n- add --clean-all\ to explicitly evict the matching reusable framework entries
• add cross-project cache-key, cache hydration, daemon-wire, and CLI parsing coverage

Validation

• \soldr cargo test -p fbuild-build-esp framework_library_cache --lib`n- \soldr cargo test -p fbuild-cli cli::tests --lib`n- \soldr cargo test -p fbuild-daemon models::tests --lib`n- \soldr cargo check -p fbuild-cli -p fbuild-daemon -p fbuild-build-esp --all-targets`n- \soldr cargo clippy -p fbuild-build-esp -p fbuild-cli -p fbuild-daemon --all-targets -- -D warnings`n- ESP32 --clean\ A/B: 255.0s cold-populate to 68.6s cache-hit; core compile 194.3s to 2.0s.

Scope

Implements the cache policy and build/deploy flags from #1089. The standalone \build clean sketch|all\ subcommands remain follow-up work in that issue.

[coderabbitai]

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: cf686c0f-962e-4444-9ca5-eb4ecf5c4c81

📥 Commits

Reviewing files that changed from the base of the PR and between 41208f2 and 20777e5.

📒 Files selected for processing (30)

• crates/fbuild-build-engine/src/lib.rs
• crates/fbuild-build-esp/src/esp32/orchestrator/build.rs
• crates/fbuild-build-esp/src/esp32/orchestrator/framework_library_cache.rs
• crates/fbuild-build-esp/src/esp32/orchestrator/framework_libs.rs
• crates/fbuild-build-esp/src/esp32/orchestrator/mod.rs
• crates/fbuild-build/src/compile_many.rs
• crates/fbuild-build/tests/avr_build.rs
• crates/fbuild-build/tests/eh_frame_strip_esp32.rs
• crates/fbuild-build/tests/esp32_build.rs
• crates/fbuild-build/tests/nxplpc_build_flags.rs
• crates/fbuild-build/tests/nxplpc_core_compile_commands.rs
• crates/fbuild-build/tests/stm32_acceptance.rs
• crates/fbuild-build/tests/teensy30_acceptance.rs
• crates/fbuild-build/tests/teensy_build.rs
• crates/fbuild-build/tests/teensylc_acceptance.rs
• crates/fbuild-cli/src/cli/args.rs
• crates/fbuild-cli/src/cli/build.rs
• crates/fbuild-cli/src/cli/clang_tools.rs
• crates/fbuild-cli/src/cli/clangd_config.rs
• crates/fbuild-cli/src/cli/deploy.rs
• crates/fbuild-cli/src/cli/dispatch.rs
• crates/fbuild-cli/src/cli/tests.rs
• crates/fbuild-cli/src/daemon_client/types.rs
• crates/fbuild-cli/src/mcp/tools.rs
• crates/fbuild-daemon/src/handlers/emulator/select.rs
• crates/fbuild-daemon/src/handlers/emulator/tests_process.rs
• crates/fbuild-daemon/src/handlers/operations/build.rs
• crates/fbuild-daemon/src/handlers/operations/deploy.rs
• crates/fbuild-daemon/src/models.rs
• crates/fbuild-packages-fetch/src/cache.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/core-framework-cache

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