Bump langchain from 0.3.25 to 1.0.3 in /backend

[dependabot[bot]]

Bumps langchain from 0.3.25 to 1.0.3.

Release notes

Sourced from langchain's releases.

langchain==1.0.3

Changes since langchain==1.0.2

chore: remove mentions of sonnet 3.5 (#33737) fix(langchain_v1): remove thread_model_call_count and run_model_call_count from tool node test (#33725) release: core 1.0.2 and langchain 1.0.3 (#33736) fix(langchain_v1): removed unsed functions in tool_call_limit middleware (#33735) style: more refs fixes (#33730) chore: move ToolNode improvements back to langgraph (#33634) feat: support structured output retry middleware (#33663) fix(langchain_v1): correct ref url (#33715) style: more refs work (#33707) feat(langchain): export UsageMetadata (#33692) release(core): 1.0.1 (#33639)

langchain==1.0.2

Changes since langchain==1.0.1

chore(langchain_v1): bump version from 1.0.1 to 1.0.2 (#33629) fix(langchain_v1): remove non llm controllable params from tool message on invocation failure (#33625)

langchain-core==1.0.2

Changes since langchain-core==1.0.1

release: core 1.0.2 and langchain 1.0.3 (#33736) fix: filter out injected args from tracing (#33729) style: more refs fixes (#33730) fix(core): improve JSON get_format_instructions using Opik Agent Optimizer (#33718) style(core): more cleanup all around (#33711) style: more refs work (#33707) fix(core): translate Google GenAI text blocks to v1 (#33699) feat(langchain): export UsageMetadata (#33692) fix: links (#33691) fix(core): fix PydanticOutputParser's get_format_instructions for v1 models (#32479) refactor(core): Minor refactor for code readability (#33674) fix(infra): add emacs backup files to gitignore (#33675) fix: update some links (#33686) style(core): more refs work (#33664)

langchain==1.0.1

Changes since langchain==1.0.0

release(langchain_v1): 1.0.1 (#33610) fix(langchain_v1): ToolRuntime default for args (#33606) style: more refs polishing (#33601) docs(langchain): update reference documentation to note moved embeddings modules (#33600) style(anthropic): use aliases for model names (#33590) chore: update pyproject.toml url entries (#33587)

langchain-openai==1.0.1

... (truncated)

Commits

• fabcacc chore: remove mentions of sonnet 3.5 (#33737)
• ac58d75 fix(langchain_v1): remove thread_model_call_count and `run_model_call_count...
• 28564ef release: core 1.0.2 and langchain 1.0.3 (#33736)
• b62a9b5 fix(langchain_v1): removed unsed functions in tool_call_limit middleware (#33...
• 76dd656 fix: filter out injected args from tracing (#33729)
• d218936 fix(openai): update model used in test (#33733)
• 123e29d style: more refs fixes (#33730)
• 6a1dca1 chore: move ToolNode improvements back to langgraph (#33634)
• 8aea6dd feat: support structured output retry middleware (#33663)
• 78a2f86 fix(core): improve JSON get_format_instructions using Opik Agent Optimizer (#...
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