fix(instrumentation-py): repair Ragas, Replicate, and Restate OTel 2.x spans

[Nightingalelyy]

Summary

• Repair the Ragas, Replicate, and Restate Python instrumentations for the OTel 2.x span contract.
• Add bounded/redacted serialization, canonical task/workflow/LLM content, precise error status, root/nested entity paths, and shared transactional lifecycle ownership.
• Add real current-SDK exported-span regressions and one patch release intent for exactly these three packages.

Validation

• Full source and paired-example diffs were audited against every applicable document under contribution/; canonical span fields, OTel attribute shapes, package boundaries, and release-intent/version ownership have no remaining package-owned violation.
• Focused package tests pass: Ragas 12/12, Replicate 10/10, Restate 7/7 (29/29).
• Root-scoped Ruff check and format-check pass for every changed package source and test file.
• All three wheels build successfully: Ragas a3619789…a7d7c, Replicate fcacbdee…acaf9, Restate c384641e…6c46.
• Release inventory, release-intent validation, and both repository diff checks pass.
• Companion locally linked examples completed all 11 processes under exact marker otel2-fix-py-group-24-20260818T031547Z.
• Respan MCP opened all 11 trace trees and all 30 full record details: one root per trace, exact parentage, 30 unique log IDs and span IDs, complete Ragas evaluation/experiment rows, one Replicate lifecycle LLM call, exact stream/error semantics, Restate handler content, exact markers, and no aliases, credentials, addresses, or duplicates.

External follow-ups

• Decorated workflow roots above the failed Replicate 429 and Restate 500 children retain error messages but are projected as success/200; package children remain precisely failed and both traces report one error.
• Full-detail ingestion omits canonical entity-path projection and reports the Replicate model owner as provider ID despite canonical gen_ai.system=replicate; no prohibited alias is added.
• Replicate live-provider coverage remains credential-gated, and a real Restate server/protocol/replay boundary requires an external runtime.

Companion examples

• respan-example-projects #72

[greptile-apps]

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