fix(ci): deselect non-MCP tests from mcp-compat workflow

[Oaklight]

Summary

• Deselect TestPTCInBatch and TestOpenAPIExecutionStack from MCP compat CI — they require codecell/OpenAPI deps not installed in this workflow
• Use fixed issue titles ([CI] MCP SDK v1.x/v2.x compatibility failure) with exact title match for dedup — eliminates collision risk from manual title edits (review non-blocking Mcp support #1)
• Tolerate pip install failure gracefully when a matrix leg's SDK line doesn't exist on PyPI (review non-blocking Mcp refine async calling mechanism #2)
• Gate test/upload/issue steps on install-mcp skip output
• Closed false-positive issues [CI] MCP SDK 1.30.0 (v1.x) compatibility failure #273, [CI] MCP SDK 2.2.0 (v2.x) compatibility failure #274 from the first failed run

Test plan

• CI passes on this PR
• Re-run mcp-compat.yml after merge — both legs should pass

[elena-oaklight]

LGTM 👍

Addresses both non-blocking flags from #272 review:

1. Dedup fix: Fixed titles ([CI] MCP SDK v${line}.x compatibility failure) + exact match (=== title) eliminates the manual-edit collision risk

2. PyPI graceful handling: pip install failure now sets skip=true with a warning instead of failing the job — handles missing SDK versions cleanly

3. Deselects: --deselect for TestPTCInBatch and TestOpenAPIExecutionStack is the right fix — those tests need codecell/openapi deps unrelated to MCP compat

4. Condition gating: Downstream steps properly check both skip outputs

Clean follow-up. 🚀

[milo-oaklight]

LGTM — addresses both non-blocking flags from #272 review.

Changes look good:

• --deselect cleanly excludes tests needing deps not installed in this workflow
• Fixed title + exact match for reliable dedup
• Graceful skip on pip failure

Minor nit (non-blocking): Line 75's 2>&1 is unnecessary — the warning message already explains the situation, and dropping the redirect lets pip's actual error remain visible in the log:

if ! pip install "${{ steps.resolve.outputs.mcp_spec }}"; then

[clementine-oaklight]

Addresses both flags from #272 cleanly:

1. Dedup fix — fixed title [CI] MCP SDK v${line}.x compatibility failure + exact match (i.title === title) eliminates the substring collision risk.

2. PyPI graceful handling — pip install failure now emits a warning and skips the leg instead of failing the job. Explicit skip=false on success ensures the conditional chain works.

3. Test deselection — --deselect for TestPTCInBatch and TestOpenAPIExecutionStack is the right fix since those require codecell/OpenAPI deps not in this workflow's scope.

All step conditions properly gate on both resolve.outputs.skip and install-mcp.outputs.skip.

LGTM — approve once CI is green.