db, database_connections, notes: 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/db/db.rst

Codex summary:

Rewrote only docs/source/db/db.rst, shortening it by about 20%.
Consolidated notes and grouped source-matching topics.
Preserved facts, identifiers, numbers, paths, SQL, tables, and references.
No internal contradictions found; no em dashes added.
Preservation and whitespace checks passed; rendering not run because Docutils is unavailable.

Words: 1982 -> 1582.
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/dev/database_connections.rst

Codex summary:

Rewrote only docs/source/dev/database_connections.rst.
Shortened the page by about 22%.
Consolidated diagnostics and pooler ownership guidance.
Preserved facts, dates, identifiers, values and references.
Diff checks passed; no internal contradictions found.

Words: 1025 -> 798.
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/dev/notes.rst

Codex summary:

Rewrote only docs/source/dev/notes.rst, reducing 2,524 words to 2,112.
Consolidated guidelines and clarified procedures.
Preserved facts, commands, values, identifiers, links, examples, and anchors.
Retained the contradiction: branch migration is pending yet described as current.
Removed em dashes; RST and diff checks passed.

Words: 2524 -> 2112.
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.

Built locally as CI builds before push.

🤖 Generated with Claude Code
Build fix: one narrow Codex call lengthened a title underline in db.rst that the rewrite left short (new Sphinx warning).