chore(seo): retitle Python framework integration guides

[amavashev]

Summary

Phase 1.4 of the Python-gap closing plan. Retitles the five Python framework integration how-tos to lead with category-search terms (budget control, cost enforcement, cost governance) instead of the brand-led "Integrating Cycles with X" pattern.

Why

The Python adoption side is lagging TypeScript materially (PyPI flat for ~6 weeks pre-source-change; cycles-client-python 157 unique cloners vs. cycles-client-typescript 288). The diagnostic (traffic signal interpretation memory — internal) found the biggest sub-gap is discovery — Cycles doesn't rank for natural Python search queries while named competitors (AgentBudget, AgentGuard, agent-cost-guardrails) do. Brand-led titles were a contributor.

Changes (frontmatter title + H1 + description on each)

File	New title
integrating-cycles-with-langchain.md	LangChain Budget Control via Callback Handlers (Python)
integrating-cycles-with-langgraph.md	LangGraph Budget Control: Per-Node Cost Enforcement
integrating-cycles-with-crewai.md	CrewAI Budget Control: Multi-Agent Cost Enforcement
integrating-cycles-with-autogen.md	AutoGen Budget Control: Cost Governance for Microsoft AutoGen
integrating-cycles-with-openai-agents.md	OpenAI Agents SDK Budget Control (Python)

What this doesn't change

• URL slugs (filenames) are unchanged — external links and search-engine indexes preserved.
• Inbound anchor links from other posts target subheadings (#the-callback-handler-approach, #prerequisites), not the H1 — verified safe.
• Body content is unchanged in this PR. Optional: tighten descriptions / leading paragraphs in a follow-up if needed.
• The OpenClaw / MCP / non-Python integration guides keep the "Integrating Cycles with X" pattern. Only Python-side titles change here, since that's where the discovery gap is.

Phase 1 status (rest of the plan)

• 1.1 SDK streaming gap — No gap. cycles-client-python has a full streaming.py module; it's just missing from the README. Follow-up: add a "Streaming" section to cycles-client-python README.
• 1.2 PyPI metadata — pending. Diff prepared; needs to be applied in cycles-client-python repo.
• 1.3 GitHub topics — pending. Needs admin access to the relevant repos.
• 1.4 How-to title rewrites — this PR.

Test plan

• npm run dev, navigate to /how-to/, confirm sidebar labels reflect new titles.
• Visit each of the 5 retitled pages, confirm the page renders with the new H1 and the in-page links still work.
• Verify the two inbound anchors still resolve: /how-to/integrating-cycles-with-langchain#the-callback-handler-approach (referenced from langgraph guide) and /how-to/integrating-cycles-with-openai-agents#prerequisites (referenced from openai-agents-sdk-has-guardrails blog post).