fix(feishu): render markdown tables via Interactive Card schema 2.0

[kevinwang2008]

Fix Feishu markdown table rendering by upgrading to Interactive Card schema 2.0.

When a markdown table is detected, wrap content in Interactive Card (schema 2.0) instead of falling back to plain text. Feishu card 'markdown' elements natively support table rendering.

[alt-glitch]

This was generated by AI during triage.

Duplicate of #12114 (canonical earliest-open Feishu markdown-table card-v2 PR). This is one of ~8+ open PRs implementing the same schema-2.0 interactive-card table rendering (see also #26429, #29630, #27046, #38453, #45907). Cluster tracked by consolidation issue #27469.

[teknium1]

Thanks for targeting a real Feishu rendering gap: current main still routes detected GFM tables to raw text at plugins/platforms/feishu/adapter.py:4524-4534.

Problems

• The PR edits gateway/platforms/feishu.py, but 5600105478ffde29d7566b45421b100eaa29c4ef moved the live adapter to plugins/platforms/feishu/adapter.py; GitHub reports this PR as conflicting.
• The new interactive type would not use the existing invalid-payload fallback, which is restricted to post sends at plugins/platforms/feishu/adapter.py:1914-1936 and edits at :1963-1971.
• The diff contains no tests, although both send() and edit_message() select their type through _build_outbound_payload (:1904, :1958).

Suggested changes

• Port the implementation to plugins/platforms/feishu/adapter.py:4524 and add Interactive Card-to-text fallback coverage for send and edit.
• Add focused payload-routing tests in tests/gateway/test_feishu.py.

This is an automated hermes-sweeper review.