fix(seo): expand short titles and fix description lengths across 22 pages

Addresses all per-page issues from the weekly SEO audit (issue #1417):
- Expand 11 meta titles from ≤37 chars to 51–59 chars
- Expand 3 descriptions below 120 chars (oncall, community-huddles, project-management)
- Trim 7 descriptions at or near the 160-char limit to ≤155 chars
- Fix og:description on contact, time-off, and pay-perks to match meta description

Closes #1417

Author: felixwidjaja

src/content/handbook/about/model.md

@@ -6,7 +6,7 @@ sidebar:
 updatedDate: Nov 13, 2025
 authors: jacob
 meta:
-  title: "Our Business Model - Datum Handbook"
+  title: "Datum's Business Model: Revenue Through Network Cloud Usage"
   description: "Datum's economic model uses consumption-based usage of our network cloud infrastructure — designed to align with customer success."
   og:
     title: "How we make money"

src/content/handbook/about/purpose.md

@@ -7,7 +7,7 @@ updatedDate: Nov 13, 2025
 authors: jacob
 meta:
   title: "Datum's Purpose - Upgrading the Internet for AI"
-  description: "Why we build. Datum's mission is to democratize access to internet superpowers—like global backbones and authoritative DNS—so you can build without barriers."
+  description: "Why we build. Datum's mission is to democratize access to internet superpowers—global backbones and authoritative DNS—so you can build without barriers."
   og:
     title: "Datum's purpose"
 ---

src/content/handbook/build/oncall.md

@@ -6,8 +6,8 @@ sidebar:
 updatedDate: May 4, 2026
 authors: jacob
 meta:
-  title: "On-Call Rotations - Datum Handbook"
-  description: "How Datum runs on-call rotations to serve customers, improve our services, and protect engineers from burnout."
+  title: "On-Call Rotations & Well-Being Policy — Datum Handbook"
+  description: "How Datum runs on-call rotations to serve customers, improve services, and protect engineers from burnout with PagerDuty and blameless reviews."
   og:
     title: "On-call"
 ---

src/content/handbook/eos/quarterly-rocks.md

@@ -6,7 +6,7 @@ sidebar:
 updatedDate: Jan 21, 2026
 authors: jacob
 meta:
-  title: "Quarterly Rocks - Datum Handbook"
+  title: "Quarterly Rocks: Q1 & Q2 2026 Priorities — Datum Handbook"
   description: "Datum defines Rocks as the critical projects we prioritize. This is our public acknowledgement of our Q1 and Q2 2026 commitments"
   og:
     title: "Quarterly Rocks"

src/content/handbook/operate/project-management.md

@@ -6,8 +6,8 @@ sidebar:
 updatedDate: May 4, 2026
 authors: jacob
 meta:
-  title: "Project Management - Datum Handbook"
-  description: "How Datum runs projects — from goal-setting and status updates to a shared definition of what 'done' actually means."
+  title: "Project Management at Datum: Goal-Setting & Done Criteria"
+  description: "How Datum runs projects — from goal-setting and status updates to a shared definition of what 'done' actually means, in an async-first, distributed team."
   og:
     title: "Project management"
 ---

src/content/handbook/operate/status.md

@@ -6,7 +6,7 @@ sidebar:
 updatedDate: May 4, 2026
 authors: jacob
 meta:
-  title: "Status Updates - Datum Handbook"
+  title: "Async Status Updates: How Datum Keeps Teams Aligned"
   description: "How we communicate progress at Datum — asynchronous status updates that keep the whole team aligned without drowning anyone in noise."
   og:
     title: "Status updates"

src/content/handbook/operate/using-github.md

@@ -7,7 +7,7 @@ updatedDate: Jan 21, 2026
 authors: jacob
 meta:
   title: "Using GitHub for Engineering Workflows - Datum Handbook"
-  description: "GitHub is a critical piece of infrastructure and a daily working environment for everyone at Datum; we organize our work in releases, enhancements and issues."
+  description: "GitHub is a critical piece of infrastructure and a daily working environment for everyone at Datum, organized around releases, enhancements, and issues."
   og:
     title: "Using GitHub"
 ---

src/content/handbook/pay-perks/career-progression.md

@@ -6,7 +6,7 @@ sidebar:
 updatedDate: May 11, 2026
 authors: jacob
 meta:
-  title: "Career Progression - Datum Handbook"
+  title: "Career Progression at Datum: Growth, Impact & Autonomy"
   description: "How career growth works at Datum: impact over ladder-climbing, real autonomy, and an open-source portfolio that speaks for itself."
   og:
     title: "Career Progression at Datum"

src/content/handbook/pay-perks/index.md

@@ -7,10 +7,10 @@ updatedDate: May 11, 2026
 authors: jacob
 meta:
   title: "Pay & Perks at Datum - Compensation, Equity, and Benefits"
-  description: "Everything you need to know about how Datum approaches pay, equity, career progression, benefits, and time off."
+  description: "How Datum approaches pay, equity, career progression, benefits, and time off — including transparent pay bands, stock options, and global benefits."
   og:
     title: "Pay & Perks at Datum"
-    description: "How Datum approaches compensation, equity, benefits, and time off."
+    description: "How Datum approaches pay, equity, career progression, benefits, and time off — including transparent pay bands, stock options, and global benefits."
 ---
 
 We believe in paying people fairly and transparently. This section covers how compensation works at Datum — from salary and equity to benefits, career progression, and time off.

src/content/handbook/pay-perks/time-off.md

@@ -10,7 +10,7 @@ meta:
   description: "Datum's approach to unlimited time off, holidays, flexible working, sick leave, maternity leave, and other leave policies."
   og:
     title: "Time Off at Datum"
-    description: "How time off works at Datum."
+    description: "Datum's approach to unlimited time off, holidays, flexible working, sick leave, maternity leave, and other leave policies."
 ---
 
 We offer unlimited time off with no accrual of vacation days. We expect everyone to take sufficient time off to recharge throughout the year — there is no maximum. Your manager may check in with you if it seems like you have not been taking adequate breaks.