[AAASM-4840] 📝 (examples): Sync README dependency version floors to manifest pins

[Chisanan232]

What changed

Each of five Python example READMEs stated a framework dependency version floor that contradicted the actual pin in its pyproject.toml, so a user following the documented floor could install a version the manifest rejects. This syncs the README prose to the pins (the source of truth) — no pin was changed:

Example	pyproject pin (unchanged)	README floor: was → now
pydantic-ai	pydantic-ai>=2.9.0	>=0.3.0 → >=2.9.0
agno-tool-policy	agno>=2.7.2	>= 2.0.0 → >= 2.7.2
haystack-tool-policy	haystack-ai>=2.31.0,<3.0	>= 2.0.0, < 3.0 → >= 2.31.0, < 3.0
semantic-kernel-tool-policy	semantic-kernel>=1.39.4	>= 1.36.0 → >= 1.39.4
smolagents-tool-policy	smolagents>=1.26.0,<2.0.0	>= 1.0, < 2.0 → >= 1.26.0, < 2.0.0

Docs-only; no dependency pins, code, or generated sdk-install blocks were touched.

Related ticket

Closes AAASM-4840

Jira: https://lightning-dust-mite.atlassian.net/browse/AAASM-4840

How to verify

For each example, the README's stated floor now matches the >= (and upper bound) in its python/<example>/pyproject.toml:

grep -E '>= ?[0-9]' python/{agno-tool-policy,haystack-tool-policy,semantic-kernel-tool-policy,smolagents-tool-policy}/README.md
grep 'requires .pydantic-ai>=2.9.0' python/pydantic-ai/README.md
git diff master --stat -- '*pyproject.toml'   # empty: no pin changed

Checklist

• PR title follows [AAASM-XXXX] <GitEmoji> (<scope>): <summary>
• No secrets, API keys, or .env files committed
• Example sub-projects include their own README.md with prerequisites and run instructions
• SDK/runtime version dependencies are documented or pinned

🤖 Generated with Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Chisanan232]

🤖 Claude Code — PR review

Scope (AAASM-4840, MED): ✅ 5 README version floors synced to the manifest pins; no pin changed.

1. CI ✅ green (22). 2. Scope ✅ docs only. 3. Side effects none. 4. FE n/a. Verdict: ready to merge pending Pioneer approval.