fix: format crumb data on same line as message (#17)

## Summary
- Data was printed on a separate line from the message, making log
output noisy and harder to scan
- Now prints inline: `webapp:llm-pricing loaded models from db +353ms {
count: 145 }`
- Set `breakLength: Infinity` on `util.inspect` to prevent Node from
wrapping the data object
- Fixed in both `ConsoleSink` (stderr output) and `formatCrumbPretty`
(CLI tail/query output)

## Test plan
- [ ] `pnpm build` passes
- [ ] Run a service with `AGENTCRUMBS=1` and verify crumbs print on a
single line
- [ ] `agentcrumbs tail` and `agentcrumbs query` also show single-line
output

Author: ericallam

.changeset/single-line-output.md

@@ -0,0 +1,5 @@
+---
+"agentcrumbs": patch
+---
+
+Format crumb data on the same line as the message instead of a separate line

packages/agentcrumbs/src/cli/format.ts

@@ -10,7 +10,7 @@ function formatDelta(dt: number): string {
 
 function formatData(data: unknown): string {
   if (data === undefined || data === null) return "";
-  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: 100 });
+  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: Infinity });
 }
 
 export function formatCrumbPretty(crumb: Crumb): string {
@@ -61,7 +61,7 @@ export function formatCrumbPretty(crumb: Crumb): string {
 
   const dataStr = formatData(crumb.data);
   if (dataStr) {
-    line += `\n${"  ".repeat(depth)}  ${dataStr}`;
+    line += ` ${dataStr}`;
   }
 
   return line;

packages/agentcrumbs/src/sinks/console.ts

@@ -10,7 +10,7 @@ function formatDelta(dt: number): string {
 
 function formatData(data: unknown): string {
   if (data === undefined || data === null) return "";
-  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: 120 });
+  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: Infinity });
 }
 
 function indent(depth: number): string {
@@ -62,7 +62,7 @@ export class ConsoleSink implements Sink {
 
     const dataStr = formatData(crumb.data);
     if (dataStr) {
-      line += `\n${pad}  ${dataStr}`;
+      line += ` ${dataStr}`;
     }
 
     process.stderr.write(line + "\n");