Python: Fix ag-ui state handling issues

[moonbox3]

Motivation and Context

In the current code we're not sending the MessageSnapshotEvent at the proper time which was causing the UI to to handle weird state values, quickly showing some text and then having it disappear. These fixes were tested with the dojo app along with the getting started MAF Python scripts.

Description

Fix state problems.
Bump package to 1.0.0b251117 for a release.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[Copilot]

Pull Request Overview

This PR fixes state handling issues in the Python ag-ui package that were causing UI flickering - text would briefly appear and then disappear due to incorrect timing of MessageSnapshotEvent emissions and improper state context injection during agent execution.

Key Changes:

• Fixed timing of MessagesSnapshotEvent emission to prevent incomplete snapshots that cause UI flicker
• Improved state context injection logic to only inject on new user turns, not during mid-execution tool calls
• Added comprehensive logging throughout the stream processing pipeline for better debugging

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

File	Description
python/packages/ag-ui/agent_framework_ag_ui_examples/agents/recipe_agent.py	Added require_confirmation=False parameter to recipe agent configuration
python/packages/ag-ui/agent_framework_ag_ui/_orchestrators.py	Fixed state context injection logic and MessagesSnapshotEvent timing; added extensive logging
python/packages/ag-ui/agent_framework_ag_ui/_message_adapters.py	Added new agui_messages_to_snapshot_format function to normalize message format for snapshots
python/packages/ag-ui/agent_framework_ag_ui/_events.py	Added text accumulation tracking and logic to skip intermediate snapshots for predictive tools; enhanced logging

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/ag-ui/agent_framework_ag_ui
_events.py	274	10	96%	160, 286, 305, 336, 454–455, 459, 596–597, 628
_message_adapters.py	158	33	79%	57, 87, 95–96, 98, 102–105, 118, 200, 202–203, 205–209, 211, 213–214, 237, 239, 241–242, 244–246, 259, 261, 324, 329–330
_orchestrators.py	403	32	92%	138, 399, 486, 553–554, 586, 653–655, 663–664, 670–671, 675–676, 690–691, 738–740, 747, 750–751, 754–757, 759–761, 834, 839
TOTAL	14988	2207	85%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
2039	127 💤	0 ❌	0 🔥	39.446s ⏱️