DOC-7104: Fix diff_rendered_hrefs.py to catch unquoted href attributes

[andy-stark-redis]

Summary

• HREF_RX in build/diff_rendered_hrefs.py only matched double-quoted href="..." attributes. hugo --minify drops quotes on any attribute value with no whitespace/quote characters, which is true for nearly every href — on a sampled release-notes page this left 5 of 240 hrefs visible to the tool, so it fingerprinted almost nothing and could report "0 diffs" regardless of what actually changed.
• This was caught by the DOC-7104 unit-2 (release-notes/) subagent, who simulated the effect and flagged it for a follow-up. I independently reproduced it against the real build outputs from DOC-7104 units 1 and 2 (open PRs #4083, #4086) before fixing.
• Verified the fix: re-running the corrected tool against both units' before/after builds now surfaces exactly the documented intentional diffs in each PR (a couple of missing-paren relref fixes rendering a previously-dead link, plus a cosmetic trailing-slash normalization on relref-resolved targets) — and nothing else. No spurious diffs, no missed ones.
• This likely means every prior href-diff verification in this migration series (DOC-6909/7047/7055/7059/7074/7079/7080/7086/7089) was checking a similarly tiny quoted-only subset. Given how narrow the actual diffs turned out to be here, I don't think this warrants re-opening merged work, but flagging it in case a retroactive spot-check is wanted.

Test plan

• Reproduced the bug empirically against real minified build output (5/240 hrefs quoted on a sampled page)
• Re-ran the corrected tool against DOC-7104 units 1 and 2's before/after builds; diffs match exactly what each unit's PR already documents

🤖 Generated with Claude Code

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Note

Low Risk
Build-only verification script change; no runtime docs or production behavior.

Overview
Fixes href fingerprinting in build/diff_rendered_hrefs.py so migration verification works on minified Hugo HTML.

HREF_RX previously matched only double-quoted href="...". hugo --minify emits mostly unquoted href= values, so the tool fingerprinted a tiny subset of links and could falsely report no diffs when links changed. The regex now also matches single-quoted and unquoted hrefs, with a short comment documenting the minify behavior.

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[github-actions]

DOC-7104

[github-actions]

🧠 Redis Memory

Found 5 related items from repository history (5 new this commit):

• PR — DOC-7089: Migrate content/operate/oss_and_stack/stack-with-enterprise/deprecated-features/ to render hooks 🆕

  Summary

• PR — DOC-7086: Migrate RDI reference/cli/ to render hooks 🆕

  Summary

• PR — DOC-7104: Migrate content/operate/rs/release-notes/ to render hooks 🆕

  Summary

• PR — DOC-7086: Migrate RDI reference/ core + data-transformation/ to render hooks 🆕

  Summary

• Commit — DOC-7003 check .md relref paths and tighten client-rendered detection 🆕

  DOC-7003 check .md relref paths and tighten client-rendered detection

Memory updated at 928dd56