chore: fix redirects (#1253)

Author: devalog

fern/docs.yml

@@ -291,7 +291,7 @@ redirects:
     destination: /learn/sdks/capabilities/websockets
     permanent: true
   - source: /learn/sdks/capabilities/augment-with-custom-code
-    destination: /learn/sdks/capabilities/custom-code
+    destination: /learn/sdks/overview/custom-code
     permanent: true
   - source: /learn/sdks/capabilities/merging-multiple-apis
     destination: /learn/sdks/capabilities/merging-apis
@@ -304,7 +304,7 @@ redirects:
 
   # SDK Guides - specific cases first, then general pattern
   - source: /learn/sdks/guides/generate-your-first-sdk
-    destination: /learn/sdks/overview/introduction
+    destination: /learn/sdks/overview/quickstart
     permanent: true
   - source: /learn/sdks/guides/publish-a-public-facing-sdk
     destination: /learn/sdks/overview/introduction
@@ -561,7 +561,7 @@ redirects:
     destination: /learn/ask-fern/getting-started/what-is-ask-fern
     permanent: true
   - source: /learn/ai-search/custom-prompting
-    destination: /learn/ask-fern/configuration/custom-prompting
+    destination: /learn/ask-fern/configuration/custom-prompts
     permanent: true
   - source: /learn/ai-search/citations
     destination: /learn/ask-fern/features/citations
@@ -576,7 +576,7 @@ redirects:
     destination: /learn/ask-fern/features/citations
     permanent: true
   - source: /learn/ask-fern/custom-prompting
-    destination: /learn/ask-fern/configuration/custom-prompting
+    destination: /learn/ask-fern/configuration/custom-prompts
     permanent: true
 
   # General Ask Fern patterns
@@ -589,6 +589,9 @@ redirects:
   - source: /learn/ai-search/:slug*
     destination: /learn/ask-fern/:slug*
     permanent: true
+  - source: /learn/ask-fern/api-reference/queries/:slug*
+    destination: /learn/ask-fern/api-reference/overview
+    permanent: true
 
   # ============================================================================
   # API REFERENCE REDIRECTS (Fern Public API)
@@ -798,6 +801,12 @@ redirects:
   - source: /learn/ai-search/getting-started/ai-search-customer-showcase
     destination: https://buildwithfern.com/showcase#ask-fern-customers
     permanent: true
+  - source: /learn/ask-fern/api-reference/conversations/get-conversation
+    destination: /learn/ask-fern/api-reference/overview
+    permanent: true
+  - source: /learn/ask-fern/api-reference/queries/:slug*
+    destination: /learn/ask-fern/api-reference/overview
+    permanent: true
 
   # V2 legacy paths (old version of docs)
   - source: /learn/v2/:slug*