[synaptic-mesh] GH#34 — crates.io packaging metadata for 0.3.0

[rmems]

Goal

Prepare synaptic-mesh 0.3.0 as the first crates.io package. Modelled on axon-encoder#60. Do not publish in this issue — dry-run only. Publish is the sibling release issue.

Cargo.toml packaging

• Bump version = "0.3.0"
• Add documentation = "https://docs.rs/synaptic-mesh"
• Add explicit readme = "README.md"
• Expand exclude to /.github/, /qodana.yaml, /REVIEW.md (keep /docs/ excluded)
• Do not add authors
• Do not duplicate repository as homepage
• Keep existing keywords/categories unless a slug is invalid

README

• Primary install path:

[dependencies]
synaptic-mesh = "0.3"

• Git dependency marked as bleeding-edge alternative
• Describe 0.3.0 as experimental pre-1.0

Publication verification (dry-run)

• cargo fmt --check
• cargo clippy --all-targets --all-features -- -D warnings
• cargo test --locked
• cargo doc --no-deps --all-features with no warnings
• cargo package --list contains only intended consumer files
• cargo package --locked succeeds
• cargo publish --dry-run --locked succeeds without warnings

Non-goals

• Real cargo publish (next issue)
• Optional serde feature, examples, #[non_exhaustive] (v0.4.0)

Milestone

v0.3.0 — First crates.io

[linear-code]

LIM-1038

[rmems]

Edited by Claude Code at the request of @rmems to align version references with milestone v0.3.0 — First crates.io.