Python: Isolate OpenAI metadata defaults from Azure routes (#8969)

* Python: isolate OpenAI metadata on Azure routes

* Python: add OpenAI routing changelog entry

Python: Bump package versions for 1.19.0 release (#8498)

* Bump Python package versions for 1.19.0 release

Bump the 26 shipping packages identified by the 2026-09-18 changelog: minor versions for Core/root, AG-UI, Declarative, and Orchestrations; patch versions for Foundry and OpenAI; and date-stamped prereleases for changed alpha and beta packages. No beta cohort bump was applied. Raise Core floors conservatively only for packages released in this cycle, while preserving existing upper bounds; Lab remains unchanged because its changes are development-only.

* Restore public PyPI sources in Python lockfile

Regenerate the release lock metadata from the public upstream lock while preserving the updated editable package versions and dependency floors. This prevents host-specific Microsoft package-feed URLs from entering the release PR.

Python: Bump package versions for 1.18.0 release (#8222)

* Bump Python package versions for 1.17.1 release

Bump agent-framework-core for two patch-level fixes and bump the root agent-framework package to keep its exact core pin aligned. No beta cohort bump was applied, and no non-core dependency floors required updates.

Copilot-Session: 97b63d4b-c53a-4754-9ebc-020d9018cbce

* Correct Python package versions for 1.18.0 release

Rebuild the release from the full python-1.17.0..upstream/main range after the original tag selector matched prerelease tags and left the compare base empty. Record all 75 Python PR commits, bump only packages with shipping changes, use minor or patch semver according to their public changes, stamp changed prerelease packages 260910 without a beta cohort bump, and raise core floors only for AG-UI and the vector connectors that require new 1.18.0 APIs.

Copilot-Session: 97b63d4b-c53a-4754-9ebc-020d9018cbce

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Copilot-Session: 97b63d4b-c53a-4754-9ebc-020d9018cbce

[BREAKING] Python: Bump package versions for 1.17.0 release (#8030)

* Prepare Python release 1.17.0

Copilot-Session: bb083dce-fac7-4965-a549-f5bf75522b86

* Use minor version for Foundry breaking change

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot-Session: bb083dce-fac7-4965-a549-f5bf75522b86

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Copilot-Session: bb083dce-fac7-4965-a549-f5bf75522b86

Python: bump package versions for 1.16.0 release (#7924)

Bump core and the root package to 1.16.0, apply targeted stable and beta package releases, and update the changelog and lockfile metadata.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 98e979bd-1d07-41fd-946d-00db8a93e248

.NET: Update version for 1.19.0 release (#7814)