tests, comp_arch, todo_list: clarity pass (Codex)

[rusholme]

Clarity and streamlining pass by Codex (gpt-6-astra, effort high), run unattended for Ben ("Unattended codex refinement of writing", 2026-09-28).

docs/source/dev/tests.rst

Codex summary:

Edited only docs/source/dev/tests.rst.
Moved test links before database details and the timeline.
Shortened headings and tightened timeline wording.
Preserved facts and references; RST and whitespace checks passed.
Kept the contradiction: the overview excludes SOC, but the table and navigation include it.

Words: 1077 -> 982.
Fact check (scripted: labels, ref and link targets, URLs, backticked spans, code lines, integers, dated rulings): 0 item(s) missing after the rewrite, 0 restore call(s); none missing against the current tip.

docs/source/sysarch/comp_arch.rst

Codex summary:

Rewrote only docs/source/sysarch/comp_arch.rst, shortening it by about 31%.
Consolidated repeated database-access explanations and tightened architecture prose.
Moved the historical-performance warning before the test description.
Preserved all facts, identifiers, numbers, commands, paths, images, and references.
No internal contradictions found; whitespace checks passed; no em dashes added.

Words: 491 -> 340.
Fact check (scripted: labels, ref and link targets, URLs, backticked spans, code lines, integers, dated rulings): 0 item(s) missing after the rewrite, 0 restore call(s); none missing against the current tip.

docs/source/todo/todo_list.rst

Codex summary:

Rewrote only docs/source/todo/todo_list.rst.
Converted uneven grid tables to RST list tables.
Shortened comments, preserving all 13 tasks, statuses, and technical details.
No internal contradictions found; no em dashes added.
Preservation and whitespace checks passed; RST rendering was unavailable.

Words: 429 -> 332.
Fact check (scripted: labels, ref and link targets, URLs, backticked spans, code lines, integers, dated rulings): 0 item(s) missing after the rewrite, 0 restore call(s); none missing against the current tip.

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