chore(0.5.13): finance-core 0.4 (path + registry); pick up V7 contracts schema

The shared accounting DB now carries the V7 migration that contract-cli
needs. invoice-cli only reads issuers/clients/products/invoices/
invoice_items/number_series — V7 is invisible to it — but its embedded
migration runner needs to know about V7 to open a DB that contract-cli
or any other suite-mate has already touched.

Cargo.toml now pins finance-core via path AND version="0.4" so local
workspace builds use the in-tree crate while published artifacts
resolve through crates.io.

Author: longevityboris

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "invoice-cli"
-version = "0.5.12"
+version = "0.5.13"
 edition = "2021"
 description = "Beautiful invoices from the CLI — international, stateful, agent-friendly"
 license = "MIT"
@@ -17,7 +17,7 @@ path = "src/main.rs"
 path = "src/lib.rs"
 
 [dependencies]
-finance-core = { path = "../finance-core" }
+finance-core = { path = "../finance-core", version = "0.4" }
 clap = { version = "4", features = ["derive", "env"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"