Plot: redraw PlotDate hosts inside blocks and attributes

A plot stamps PlotDate fields, but the redraw only dropped the host's
own tessellation: an attribute is drawn by its INSERT and a host inside
a block definition by every reference to the block, so both still
showed the old value on screen and in the plotted output. The changed
hosts now redraw through their INSERT / the block's references (block
cache refreshed), without re-tessellating anything else. The codec is
patched to the field format code fixes.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

Cargo.toml

@@ -94,6 +94,9 @@ objc2-foundation = { version = "0.2", features = ["NSArray", "NSURL", "NSString"
 iced_core = { git = "https://github.com/iced-rs/iced.git", rev = "23604ff22ab0aad9e00b9327cb7b8546ed84db39" }
 iced_widget = { git = "https://github.com/iced-rs/iced.git", rev = "23604ff22ab0aad9e00b9327cb7b8546ed84db39" }
 
+[patch."https://github.com/HakanSeven12/opencadcodec.git"]
+opencadcodec = { git = "https://github.com/ramox81/cadcodec.git", rev = "f51f468" }
+
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 getrandom = "0.3"
 ocs_plugin_api = { path = "crates/ocs_plugin_api", features = ["host"] }