docs(api): add deprecation note for text search endpoint

Add deprecation notice to /indexes/{name}/search/text endpoint
indicating it will be removed once iscc-web supports dedicated
simprint generation. Simprint processing requires heavy dependencies
and should be delegated to a separate service.

Author: titusz

iscc_search/openapi/openapi.json

@@ -740,7 +740,7 @@
     "/indexes/{name}/search/text": {
       "post": {
         "summary": "Search by plain text",
-        "description": "Generates simprints from the provided text and searches for similar content\nsegments in the index. Returns chunk-level matches based on text similarity.\n",
+        "description": "Generates simprints from the provided text and searches for similar content\nsegments in the index. Returns chunk-level matches based on text similarity.\n\n**Note**: This endpoint will be removed once iscc-web supports dedicated simprint generation.\nSimprint generation requires heavy dependencies and should be handled by a separate service.\n",
         "operationId": "searchText",
         "tags": [
           "search"

iscc_search/openapi/openapi.yaml

@@ -484,6 +484,9 @@ paths:
       description: |
         Generates simprints from the provided text and searches for similar content
         segments in the index. Returns chunk-level matches based on text similarity.
+
+        **Note**: This endpoint will be removed once iscc-web supports dedicated simprint generation.
+        Simprint generation requires heavy dependencies and should be handled by a separate service.
       operationId: searchText
       tags:
         - search

iscc_search/server/search.py

@@ -92,6 +92,9 @@ def search_text(
     If iscc-sct is installed, also generates SEMANTIC_TEXT_V0 simprints.
     Returns chunk-level matches based on text similarity.
 
+    **Note**: TODO - This endpoint will be removed once iscc-web supports dedicated simprint generation.
+    Simprint generation requires heavy dependencies and should be handled by a separate service.
+
     :param name: Index name
     :param text_query: TextQuery with plain text content
     :param limit: Maximum number of results to return (default: 100)