docs: reflow hard-wrapped prose to one line per paragraph

Markdown and editors soft-wrap on their own, so the manual ~75-char line
breaks across the docs added nothing but noise. Join wrapped prose, list
items, and paragraphs into single lines across 67 docs — README, CLAUDE.md,
deployment, usage, the RAG knowledge base, and the agent role prompts.
Whitespace-only: code fences, tables, and blockquote alerts are byte-identical
and the change is token-verified (no content altered). Applied with a
deterministic reflow tool (committed separately).

Also lands two doc edits that were awaiting commit: the measured under-load
resource numbers in usage.md and the pr_reviewer additions to the
org-structure RAG doc.

.github/ISSUE_TEMPLATE/documentation.md

@@ -17,8 +17,7 @@ ___
 Current Documentation
 ---------------------
 
-Link to (or name) the current documentation page or section that needs improvement:
-[Link it here](https://example.com)
+Link to (or name) the current documentation page or section that needs improvement: [Link it here](https://example.com)
 
 ___