Transparency page: state the open-code/private-inputs principle verbatim (#826)

https://projects.knownelement.com/issues/826#note-20

tools/grav-publish.sh

@@ -142,12 +142,14 @@ We run an ultra-open and transparent organization. This site and its
 read-only** — performance data, benchmarks, risk intelligence,
 architecture and decision reports are all in the open.
 
-**The one carve-out**: revenue and expense detail is private to LLC
-members and is never published here (system costs, billing history,
-contract rates, per-tenant margins). This line is enforced mechanically:
-the publishing script redacts financial literals from every public page
-at render time — see
+**The principle**: our code, formulas, and methodology are open; the
+inputs to them are not. Revenue and expense detail (contract rates,
+system costs, billing history, per-tenant margins, customer data) is
+private to LLC members and is never published here. This line is enforced
+mechanically: the publishing script redacts private literals from every
+public page at render time — see
 [`grav-publish.sh`](https://git.knownelement.com/KNEL/KNELPerf/src/branch/main/tools/grav-publish.sh).
+Public market signals (e.g. ERCOT prices) are open data and stay open.
 
 Publishing is exclusively git-based: content lands via pull from the
 public repo; the site runs no foreign tooling. The Grav admin exists only