chore(pds): extract invalidRecordError helper in repo.ts (#17)

* feat(pds): load official Bluesky lexicon schemas for validation

Replaces empty validator with actual schema validation using official
Bluesky lexicon JSON files vendored from the atproto repository.

Changes:
- Added update-lexicons.sh script to fetch official schemas from GitHub
- Vendored 16 lexicon schemas (core, feed, actor, graph, richtext, embed)
- Updated validation.ts to load all schemas with proper dependencies
- Added 11 Bluesky-specific validation tests (all passing)
- Tree-shakeable: only JSON files imported, no large dependencies

Schemas loaded:
- Core: com.atproto.repo.strongRef, com.atproto.label.defs
- Feed: app.bsky.feed.{post, like, repost, threadgate}
- Actor: app.bsky.actor.profile
- Graph: app.bsky.graph.{follow, block, list, listitem}
- Richtext: app.bsky.richtext.facet
- Embed: app.bsky.embed.{images, external, record, recordWithMedia}

All 19 tests passing (8 validation tests + 11 Bluesky tests).

* chore(pds): typing improvements and dependency cleanup

- Use LexiconDoc type instead of any in validation.ts
- Add vite/client types to tsconfig for import.meta.glob
- Format firehose test and add proper sequencer typing
- Remove unused echo from update-lexicons script
- Remove unused dependencies from lockfile

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

* refactor(pds): extract invalidRecordError helper in repo.ts

Reduces duplication for InvalidRecord error responses across
createRecord, putRecord, and applyWrites endpoints.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: ascorbic

packages/pds/src/xrpc/repo.ts

@@ -3,6 +3,21 @@ import { AtUri, ensureValidDid } from "@atproto/syntax";
 import { AccountDurableObject } from "../account-do";
 import { validator } from "../validation";
 
+function invalidRecordError(
+	c: Context<{ Bindings: Env }>,
+	err: unknown,
+	prefix?: string,
+): Response {
+	const message = err instanceof Error ? err.message : String(err);
+	return c.json(
+		{
+			error: "InvalidRecord",
+			message: prefix ? `${prefix}: ${message}` : message,
+		},
+		400,
+	);
+}
+
 export async function describeRepo(
 	c: Context<{ Bindings: Env }>,
 	accountDO: DurableObjectStub<AccountDurableObject>,
@@ -211,13 +226,7 @@ export async function createRecord(
 	try {
 		validator.validateRecord(collection, record);
 	} catch (err) {
-		return c.json(
-			{
-				error: "InvalidRecord",
-				message: err instanceof Error ? err.message : String(err),
-			},
-			400,
-		);
+		return invalidRecordError(c, err);
 	}
 
 	const result = await accountDO.rpcCreateRecord(collection, rkey, record);
@@ -298,13 +307,7 @@ export async function putRecord(
 	try {
 		validator.validateRecord(collection, record);
 	} catch (err) {
-		return c.json(
-			{
-				error: "InvalidRecord",
-				message: err instanceof Error ? err.message : String(err),
-			},
-			400,
-		);
+		return invalidRecordError(c, err);
 	}
 
 	try {
@@ -368,16 +371,9 @@ export async function applyWrites(
 			try {
 				validator.validateRecord(write.collection, write.value);
 			} catch (err) {
-				return c.json(
-					{
-						error: "InvalidRecord",
-						message: `Write ${i}: ${err instanceof Error ? err.message : String(err)}`,
-					},
-					400,
-				);
+				return invalidRecordError(c, err, `Write ${i}`);
 			}
 		}
-		// Delete operations don't need validation
 	}
 
 	try {