refactor: rename pod crate to worker

crates/workflow/README.md

@@ -16,7 +16,7 @@ Does not own:
 
 - generated memory records (`memory`)
 - Ticket file lifecycle (`crates/ticket`, `.yoi/tickets/`)
-- Pod orchestration decisions (`pod`, workflows executed by agents)
+- Worker orchestration decisions (`worker`, workflows executed by agents)
 - product CLI command shape (`yoi`)
 
 ## Design notes

crates/workflow/src/skill.rs

@@ -57,7 +57,7 @@ pub struct SkillRecord {
     pub description: String,
     pub body: String,
     /// The skill directory (parent of `SKILL.md`). Carried so callers can
-    /// register `scripts/` / `references/` / `assets/` against the Pod's
+    /// register `scripts/` / `references/` / `assets/` against the Worker's
     /// scope.
     pub dir: PathBuf,
     /// Path to the `SKILL.md` file itself. Used as the resolved path on

crates/workflow/src/workflow.rs

@@ -2,7 +2,7 @@
 //!
 //! Workflows live under `<workspace>/.yoi/workflow/<slug>.md`. They are
 //! human-authored Markdown documents with YAML frontmatter. The loader is
-//! intentionally strict about malformed records because Pod startup should
+//! intentionally strict about malformed records because Worker startup should
 //! fail rather than silently ignoring a broken procedural instruction.
 
 use std::collections::BTreeMap;