Hoist the GitHub stats into one shared constant (#134)

The star and fork counts were hardcoded independently in app/page.tsx
and app/ai/page.tsx with no shared constant, so they drifted: the
homepage said 3.2k+ stars and 200+ forks while /ai said 3.4k+ and 240+.
Both sections render adjacent copy about the project being built in the
open, so a visitor moving between the two pages saw two different star
counts.

Neither figure was false - the + suffix covers the actual 3423 stars and
248 forks - but nothing stopped the next refresh from updating one page
and leaving the other behind, which is exactly what happened when the AI
page was refreshed in #121.

Both pages now read from app/services/projectStats.ts, which also holds
the TSC member and organization counts quoted on both pages (verified
against upstream MAINTAINERS.md: 11 members across Microsoft 4, Amazon 4,
AB InBev 1, Rippling 1, YugabyteDB 1). Values stay hardcoded rather than
fetched so the build keeps no network dependency; the refresh command and
the date last checked are recorded next to them.

Addresses the second half of #128. The create_indexes_background row in
the first half is content in documentdb/docs and needs a separate PR
there.

Author: GuanzhouSong

app/ai/page.tsx

@@ -2,6 +2,12 @@ import Image from "next/image";
 import Link from "next/link";
 import CommandSnippet from "../components/CommandSnippet";
 import { getMetadata } from "../services/metadataService";
+import {
+  documentdbGitHubForks,
+  documentdbGitHubStars,
+  documentdbTscMembers,
+  documentdbTscOrganizations,
+} from "../services/projectStats";
 import { withBasePath } from "../services/sitePath";
 
 export const metadata = getMetadata({
@@ -166,17 +172,17 @@ const useCases = [
 
 const credibilityPoints = [
   {
-    value: "3.4k+",
+    value: documentdbGitHubStars,
     label: "GitHub stars",
   },
   {
-    value: "240+",
+    value: documentdbGitHubForks,
     label: "Forks",
   },
   {
-    value: "11",
+    value: documentdbTscMembers,
     label: "TSC members",
-    detail: "across 5 organizations",
+    detail: `across ${documentdbTscOrganizations} organizations`,
   },
 ];
 

app/page.tsx

@@ -3,6 +3,12 @@ import Link from "next/link";
 import CommandSnippet from "./components/CommandSnippet";
 import { documentdbKubernetesOperatorQuickStartUrl } from "./services/externalLinks";
 import { getMetadata } from "./services/metadataService";
+import {
+  documentdbGitHubForks,
+  documentdbGitHubStars,
+  documentdbTscMembers,
+  documentdbTscOrganizations,
+} from "./services/projectStats";
 import { withBasePath } from "./services/sitePath";
 
 export const metadata = getMetadata({
@@ -131,19 +137,19 @@ const trustBadges = [
 
 const credibilityPoints = [
   {
-    value: "3.2k+",
+    value: documentdbGitHubStars,
     label: "GitHub stars",
     detail: "on documentdb/documentdb",
   },
   {
-    value: "200+",
+    value: documentdbGitHubForks,
     label: "Public forks",
     detail: "public on GitHub",
   },
   {
-    value: "11",
+    value: documentdbTscMembers,
     label: "TSC members",
-    detail: "representing 5 organizations",
+    detail: `representing ${documentdbTscOrganizations} organizations`,
   },
 ];
 

app/services/projectStats.ts

@@ -0,0 +1,19 @@
+// Single source for the upstream project figures quoted on marketing pages.
+// They were previously hardcoded independently on / and /ai, drifted apart,
+// and then went stale - a visitor moving between the two pages saw two
+// different star counts.
+//
+// Deliberately not fetched at build time: that would add a network dependency
+// (and a rate-limited, unauthenticated one) to every build. Refresh by hand:
+//
+//   curl -s https://api.github.com/repos/documentdb/documentdb \
+//     | jq '{stars: .stargazers_count, forks: .forks_count}'
+//
+// Last checked 2026-08-03: 3423 stars, 248 forks.
+export const documentdbGitHubStars = '3.4k+';
+export const documentdbGitHubForks = '240+';
+
+// From upstream MAINTAINERS.md: 11 members across Microsoft (4), Amazon (4),
+// AB InBev (1), Rippling (1), and YugabyteDB (1).
+export const documentdbTscMembers = '11';
+export const documentdbTscOrganizations = '5';