Rewrite design docs for quick reference

[tzanko-matev]

Summary

• rewrite the design-docs directory into concise quick-reference guides tailored for rapid scanning
• refresh all associated ADRs and status trackers with short context, decision, and follow-up sections

Testing

• not run (documentation-only change)

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https://chatgpt.com/codex/tasks/task_e_68dec9dd9ba083239c01265f8823534f

[github-actions]

Coverage Summary

Rust (lines)
78.7% covered (1,854 / 2,355 | 501 missed)

File	Lines	Miss	Cover
codetracer-python-recorder/src/code_object.rs	117	16	86.3%
codetracer-python-recorder/src/lib.rs	11	11	0.0%
codetracer-python-recorder/src/logging.rs	11	11	0.0%
codetracer-python-recorder/src/monitoring/mod.rs	69	3	95.7%
codetracer-python-recorder/src/monitoring/tracer.rs	560	188	66.4%
codetracer-python-recorder/src/runtime/activation.rs	117	9	92.3%
codetracer-python-recorder/src/runtime/frame_inspector.rs	109	24	78.0%
codetracer-python-recorder/src/runtime/logging.rs	15	4	73.3%
codetracer-python-recorder/src/runtime/mod.rs	839	100	88.1%
codetracer-python-recorder/src/runtime/output_paths.rs	80	1	98.8%
codetracer-python-recorder/src/runtime/value_capture.rs	94	58	38.3%
codetracer-python-recorder/src/runtime/value_encoder.rs	88	6	93.2%
codetracer-python-recorder/src/session.rs	54	54	0.0%
codetracer-python-recorder/src/session/bootstrap.rs	176	8	95.5%

Python (statements)
67.6% covered (96 / 142 | 46 missed)

File	Stmts	Miss	Cover
codetracer-python-recorder/codetracer_python_recorder/__init__.py	5	0	100.0%
codetracer-python-recorder/codetracer_python_recorder/__main__.py	37	37	0.0%
codetracer-python-recorder/codetracer_python_recorder/api.py	5	0	100.0%
codetracer-python-recorder/codetracer_python_recorder/auto_start.py	20	7	65.0%
codetracer-python-recorder/codetracer_python_recorder/formats.py	13	1	92.3%
codetracer-python-recorder/codetracer_python_recorder/session.py	62	1	98.4%

Generated automatically via generate_coverage_comment.py.