fix(cli): declare sqlshield-introspect via workspace deps for crates.io publish

`cargo publish` rejects path-only dependencies because the version is
required to resolve the crate on crates.io. The first attempt to
publish `sqlshield-cli` failed with:

    all dependencies must have a version specified when publishing.
    dependency `sqlshield-introspect` does not specify a version

Move `sqlshield-introspect` into `[workspace.dependencies]` with both
`version` and `path`, and reference it from `sqlshield-cli` via
`workspace = true`. Verified locally with `cargo publish -p
sqlshield-cli --dry-run`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: davidsmfreire

Cargo.toml

@@ -17,4 +17,5 @@ license = "MIT"
 repository = "https://github.com/davidsmfreire/sqlshield"
 
 [workspace.dependencies]
-sqlshield = { version = "0.0.1", path = "sqlshield"}
+sqlshield = { version = "0.0.1", path = "sqlshield" }
+sqlshield-introspect = { version = "0.0.1", path = "sqlshield-introspect" }

sqlshield-cli/Cargo.toml

@@ -36,5 +36,5 @@ clap = { version = "4.4.18", features = ["derive"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 sqlshield = { workspace = true }
-sqlshield-introspect = { path = "../sqlshield-introspect", optional = true }
+sqlshield-introspect = { workspace = true, optional = true }
 toml = "0.8"