feat: updating LLM calls and other minor fixes

[TEJASNARAYANS]

What Changed?

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Why?

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How to Test?

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Checklist

• I have read the CONTRIBUTING.md guide.
• My code follows the project's style guidelines.
• I have added tests that prove my fix is effective or my feature works.
• I have updated documentation where needed.

[greptile-apps]

Greptile Summary

The PR updates LLM metric-call grouping and expected-call reporting, adjusts call-import lifecycle rollups, and adds invitation-aware authentication flows.

• Groups metrics sharing an LLM configuration into one evaluation call.
• Exposes expected LLM calls per evaluation row.
• Updates parent import status handling and evaluation materialization.
• Adds invitation preview, signup, login, and acceptance behavior.
• Includes frontend, recording-provider, configuration, and test updates.

Confidence Score: 4/5

The PR is not yet safe to merge because parent call-import status can still be derived from an arbitrary sibling evaluation when creation timestamps tie.

The latest-evaluation query still lacks a deterministic tie-breaker, while supported sibling evaluations are inserted in one transaction and can later reach different terminal states; the parent rollup can therefore expose an inconsistent status.

Files Needing Attention: app/services/call_imports/bulk_ops.py

Important Files Changed

Filename	Overview
app/workers/tasks/evaluate_call_import_row_core.py	Adds configuration-key resolution and buckets prompt groups so metrics sharing provider, model, generation configuration, and credentials use one LLM call.
app/services/call_imports/bulk_ops.py	Adds evaluation-driven parent status mapping, but the previously reported ambiguous sibling-status selection remains.
app/api/v1/routes/call_import_evaluations.py	Exposes expected LLM-call counts and changes row materialization and parent processing-state behavior.
app/api/v1/routes/auth.py	Adds invitation preview and acceptance flows and allows signup to attach local credentials to existing passwordless users.
app/services/testing/test_agent_bridge_service.py	Centralizes Vapi recording URL extraction and conditionally authenticates non-presigned recording downloads.

_{Reviews (8): Last reviewed commit: "fix: updating URL fix" | Re-trigger Greptile}