refactor(application): add bounded typed controller command queue

[stritti]

Summary

Adds the allocation-free queue needed to route adapter requests into the Core-1 application owner without exposing mutable controller objects.

Changes

• add ControllerCommandQueue with fixed capacity 16
• queue stores copies of trivially-copyable ControllerCommand values
• ESP32 synchronization uses a short portMUX critical section
• native builds use std::mutex
• add FIFO, full-queue and wrap-around regression tests
• update the architecture OpenSpec task list

Scope

This PR intentionally does not replace MqttCommandQueue yet. That existing queue is already a production safety boundary introduced by #209. A later migration can translate MQTT/Web/local-UI input into typed commands incrementally and remove the protocol-specific queue only after equivalent coverage exists.

Ownership model

Adapters are producers. The Core-1 application loop is the intended single consumer and single writer of mutable controller/domain state.

Stacked on #214.

[github-actions]

✅⚠️MegaLinter analysis: Success with warnings

Descriptor	Linter	Files	Fixed	Errors	Max errors	Warnings	Elapsed time
✅ ACTION	actionlint	8		0		0	0.76s
✅ BASH	bash-exec	2		0		0	0.65s
✅ BASH	shellcheck	2		0		0	0.65s
✅ BASH	shfmt	2		0		0	0.01s
✅ C	clang-format	1		0		0	0.07s
✅ C	cppcheck	1		0		0	0.03s
✅ C	cpplint	1		0		0	0.35s
✅ CPP	clang-format	92		0		0	0.78s
✅ CPP	cppcheck	92		0		0	6.54s
✅ CPP	cpplint	92		0		0	7.87s
✅ EDITORCONFIG	editorconfig-checker	277		0		0	0.83s
✅ JSON	jsonlint	6		0		0	0.11s
✅ JSON	v8r	6		0		0	4.7s
⚠️ MARKDOWN	markdownlint	107		4		0	4.33s
✅ YAML	yamllint	26		0		0	0.97s

Detailed Issues

⚠️ MARKDOWN / markdownlint - 4 errors

.opencode/skills/web-ui/SKILL.md:34 error MD028/no-blanks-blockquote Blank line inside blockquote
docs/superpowers/plans/2026-08-10-olimex-c6-local-ui-implementation.md:106:401 error MD013/line-length Line length [Expected: 400; Actual: 452]
docs/superpowers/plans/2026-08-16-norvi-button-calibration.md:7:401 error MD013/line-length Line length [Expected: 400; Actual: 412]
openspec/changes/controller-architecture-contracts/design.md:171:401 error MD013/line-length Line length [Expected: 400; Actual: 448]

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Native Test Coverage

Metric	Value
Line Coverage	49.8%
Branch Coverage	75.2%
Lines Hit/Total	418/840
Branches Hit/Total	182/242

Report from native unit tests (ASan + gcov).

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Native Test Coverage

Metric	Value
Line Coverage	49.8%
Branch Coverage	75.2%
Lines Hit/Total	418/840
Branches Hit/Total	182/242

Report from native unit tests (ASan + gcov).

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[github-actions]

Native Test Coverage

Metric	Value
Line Coverage	49.8%
Branch Coverage	75.2%
Lines Hit/Total	418/840
Branches Hit/Total	182/242

Report from native unit tests (ASan + gcov).

[github-actions]

Native Test Coverage

Metric	Value
Line Coverage	49.8%
Branch Coverage	75.2%
Lines Hit/Total	418/840
Branches Hit/Total	182/242

Report from native unit tests (ASan + gcov).

[github-actions]

Native Test Coverage

Metric	Value
Line Coverage	49.8%
Branch Coverage	75.2%
Lines Hit/Total	418/840
Branches Hit/Total	182/242

Report from native unit tests (ASan + gcov).

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.

[github-actions]

Native Test Coverage

Metric	Value
Line Coverage	50.9%
Branch Coverage	76.7%
Lines Hit/Total	437/859
Branches Hit/Total	198/258

Report from native unit tests (ASan + gcov).

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You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.

[github-actions]

Native Test Coverage

Metric	Value
Line Coverage	50.9%
Branch Coverage	76.7%
Lines Hit/Total	437/859
Branches Hit/Total	198/258

Report from native unit tests (ASan + gcov).