[Docs] Fix examples that don't stand alone and drop stale release info

[chr-hertel]

• Missing imports and $request in the protocol eras examples, missing TextResourceContents import in the extensions example
• Laravel's logger() replaced with a PSR-3 logger in the client logging example
• Client examples in connecting & errors use elicitation instead of the deprecated sampling, roots and setLoggingLevel()
• SDK tier page no longer hard-codes the latest release, conformance numbers are marked as the audit's

[Copilot]

🟡 Changes recommended

Several examples remain nonfunctional due to an undefined request, missing import, absent callback return, and unadvertised capability.

4 open findings

• Return an ElicitResult from the elicitation callback · New
• Advertise elicitation support in the client capabilities · New
• Restore the missing LoggingLevel import · New
• Create $request before using it in the modern-only example · New

What changed in this PR

Updates documentation examples and removes time-sensitive release details.

Changes:

• Adds missing imports and request setup to examples.
• Replaces deprecated client features with elicitation.
• Clarifies that conformance figures came from an audit.

File	Description
docs/​sdk-tier.md	Makes audit and release status wording less stale.
docs/​run/​protocol-eras.md	Adds dependencies and request initialization.
docs/​client/​server-requests.md	Uses a PSR-3 logger.
docs/​client/​errors.md	Replaces sampling with elicitation.
docs/​client/​connecting.md	Updates capabilities and handlers to elicitation.
docs/​advanced/​extensions.md	Adds the missing content class import.

🧠 Review effort: Balanced

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[Copilot]

🟢 Approval recommended

The documentation changes are accurate, internally consistent, and address the stated stale and incomplete examples.

0 open findings

4 resolved since last review

• Return an ElicitResult from the elicitation callback
• Create $request before using it in the modern-only example
• Restore the missing LoggingLevel import
• Advertise elicitation support in the client capabilities

🧠 Review effort: Balanced

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