feat(volo): introduce shmipc as transport layer protocol

[yukiiiteru]

Motivation

Introduce shmipc as transport layer protocol

---

Note

Introduces ShmIPC as an optional transport and updates the networking stack to support it, along with a new async IO extension trait.

• Adds net::shmipc (address, config, conn, helpers) and feature-gates it behind features = ["shmipc"]
• Extends net::Address, ConnStream, OwnedReadHalf/OwnedWriteHalf, DefaultIncoming, and dialing to handle Shmipc endpoints/streams; TLS explicitly rejects Shmipc
• Replaces net::ready::AsyncReady with net::ext::AsyncExt; updates BufReader and thrift default codec bounds to use AsyncExt
• HTTP/GRPC client code paths add catch-all for unsupported address variants
• CI: run clippy with shmipc feature where applicable; add --no-shmipc flag for macOS/Windows runs; add coverage job
• Cargo: add shmipc and arc-swap deps and wire feature in volo and workspace

^{Written by Cursor Bugbot for commit 029d88b. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

❌ Patch coverage is 5.12821% with 74 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.28%. Comparing base (5fdef10) to head (029d88b).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
volo/src/net/ext.rs	0.00%	27 Missing ⚠️
volo/src/net/conn.rs	0.00%	25 Missing ⚠️
volo/src/net/mod.rs	7.69%	12 Missing ⚠️
volo/src/net/dial.rs	0.00%	6 Missing ⚠️
volo-grpc/src/transport/client.rs	0.00%	1 Missing ⚠️
volo-http/src/client/target.rs	0.00%	1 Missing ⚠️
volo-http/src/error/client.rs	0.00%	1 Missing ⚠️
volo-http/src/server/utils/client_ip.rs	0.00%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (5.12%) is below the target coverage (70.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #636      +/-   ##
==========================================
- Coverage   43.44%   43.28%   -0.16%     
==========================================
  Files         160      160              
  Lines       19383    19439      +56     
==========================================
- Hits         8421     8415       -6     
- Misses      10962    11024      +62     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[PureWhiteWu]

@cursor review

[cursor]

Cursor Bugbot has reviewed your changes and found 3 potential issues.

^{Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.}