docs: align signup messaging toward HolmesGPT agentic cost savings

[aantn]

Reframe the KRR README's outbound CTAs so they match the HolmesGPT-focused
signup page. Emphasize that HolmesGPT is an AI agent that goes beyond KRR's
rule-based recommendations to find and fix cost-saving opportunities, while
keeping the bridge from KRR's cost savings on the KRR side.

https://claude.ai/code/session_01KRE69m74XbJqnMGJLGfM8s

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 23460c4a-8ffa-412f-a20e-52bc2416039c

📥 Commits

Reviewing files that changed from the base of the PR and between 383275a and 03f9dd3.

📒 Files selected for processing (1)

• README.md

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Walkthrough

Three lines in README.md are updated to reframe HolmesGPT as an "AI agent" for agentic cost savings: the Features list bullet is replaced, a new explanatory paragraph is added to the Free KRR UI on Robusta SaaS section, and a new bullet is added to the integrations list.

Changes

README HolmesGPT Messaging Updates

Layer / File(s)	Summary
HolmesGPT agentic cost savings copy README.md	Features list bullet reworded to "Agentic Cost Savings"; new paragraph added in the Free KRR UI section describing HolmesGPT pairing with KRR; new bullet added in the integrations list about going beyond rule-based recommendations.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating README messaging to emphasize HolmesGPT's agentic cost-saving capabilities and align with signup page CTAs.
Description check	✅ Passed	The description clearly relates to the changeset by explaining the reframing of KRR README CTAs to highlight HolmesGPT as an AI agent beyond rule-based recommendations.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/krr-signup-holmesgpt-messaging-hgdq7u

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