refactor(llm): remove tool-call jail, depend on dynamo-parsers

[rmccorm4]

Summary

• Cherry-pick of refactor(llm): remove tool-call jail, depend on dynamo-parsers #11112 to release/1.3.0
• Remove the duplicated v1 tool-call jail from dynamo-llm and use the published dynamo-parsers 3.1.0 implementation
• Preserve llm_metrics across chunks buffered by the moved jail

Fixes DIS-2320
Relates to DIS-2296

Conflict resolution

• Resolved the expected modify/delete conflicts by deleting the legacy jail.rs and test_jail.rs
• The release branch had no release-only commits in either file; its only divergence was main-only fix(toolcalling): synthesize tool_calls finish_reason when stream lacks one #11045, which is included in dynamo-parsers 3.1.0

Original PR

• Main PR: refactor(llm): remove tool-call jail, depend on dynamo-parsers #11112
• Upstream squash commit: 867d9ab02c8f7e413374db5d12ef5e9d79b0e840

Validation

• Locked Cargo metadata resolves for the root, KVBM, and Python manifests
• tool_choice: 36 passed
• test_streaming_tool_parsers: 37 passed
• test_reasoning_parser: 12 passed, 1 ignored
• tool_choice_finish_reasons: 6 passed
• Linux CI passes with default block-manager features

[devin-ai-integration]

Devin Review found 1 potential issue.

[dagil-nvidia]

Release backport quality gate: conflict resolution against the source history, targeted tests, and current CI verified at head b586f07.