style: Apply cargo fmt and clippy fixes across codebase

Automated formatting and lint corrections from parallel agent work:

- cargo fmt: import reordering (alphabetical), line wrapping to respect
  max width, trailing comma normalization, destructuring alignment,
  function signature reformatting, match arm formatting
- clippy (pedantic): Range::contains() instead of manual comparisons,
  i64::from() instead of `as i64` casts, .clamp() instead of
  .max().min() chains, let-chain refactors (if-let with &&),
  #[allow(clippy::too_many_arguments)] and
  #[allow(clippy::field_reassign_with_default)] where warranted
- Removed trailing blank lines and extra whitespace

No behavioral changes. All existing tests pass unmodified.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/cli/commands/embed.rs

@@ -3,12 +3,12 @@
 use console::style;
 use serde::Serialize;
 
+use crate::Config;
 use crate::core::db::create_connection;
 use crate::core::error::Result;
 use crate::core::paths::get_db_path;
 use crate::embedding::ollama::{OllamaClient, OllamaConfig};
 use crate::embedding::pipeline::embed_documents;
-use crate::Config;
 
 /// Result of the embed command.
 #[derive(Debug, Default, Serialize)]
@@ -69,10 +69,7 @@ pub async fn run_embed(
 
 /// Print human-readable output.
 pub fn print_embed(result: &EmbedCommandResult) {
-    println!(
-        "{} Embedding complete",
-        style("done").green().bold(),
-    );
+    println!("{} Embedding complete", style("done").green().bold(),);
     println!("  Embedded: {}", result.embedded);
     if result.failed > 0 {
         println!("  Failed:   {}", style(result.failed).red());