[anik120]

Description

Backports the following PRs from main onto the 0.7.2 patch release.

#2957 — LCORE-4621: request model configuration with configurable limit threshold

• (skipped 73b49343 "Regenerated doc" — non-functional generated artifact; diagram reflected main's model state)

#2961 — LCORE-4621: Max response request size customization

• 71f5cf5f LCORE-4621: Max response request size customization
• 4dc2f389 Updated unit tests
• 53f4d4a3 Updated doc

#2968 — LCORE-4621: Apply response request max size limit

• f240baf7 LCORE-4621: Apply response request max size limit

#2974 — LCORE-4621: Increase threshold to 128kB

• 9a24a0ab LCORE-4621: Increase threshold to 128kB
• 3f62a5fc Regenerated OpenAPI spec

#2945 — LCORE-4570: update gpt-4o-mini to gpt-5.6-luna

Backported as a single squashed commit (cherry-pick -m 1 of the PR merge):

• b9b88802 update gpt-4o-mini to gpt-5.6-luna
• d7ef10c9 fix failures
• e06a63f7 fix docs
• (skipped 3c8f2677 "Merge branch 'main'" — branch-sync merge, not PR content)

#3021 — LCORE-4801: Implemented X-LCS-Shield-After-Last-Refusal logic

• 86766ed0 Implemented X-LCS-Shield-After-Last-Refusal logic

---

Added later to fix Agent skills e2e test failure:

#2955 — LCORE-4570: add skills config reference

• 1d40b116 fix skills config reference
• 43b97b60 add unit tests

Type of change

• Refactor
• New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up service version
• Bump-up dependent library [pyproject.toml + uv.lock]
• Bump-up dependent library [requirements.*.txt for Konflux]
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Konflux configuration change
• Unit tests improvement
• Integration tests improvement
• End to end tests improvement
• Benchmarks improvement

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[anik120]

@jrobertboos @asimurka added https://github.com/lightspeed-core/lightspeed-stack/pull/2955/commits to the list of commits here to fix skills e2e failure. PTAL.

[radofuchs]

LGTM

[tisnik]

LGTM