Fix PostHog api_key attribute and remove debug logging

PostHog SDK requires `api_key` (not just `project_api_key`) for
server-side capture calls. Sets both attributes. Removes debug
prints and posthog.debug flag.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app.py

@@ -3,6 +3,7 @@ import hashlib
 import json
 import os
 import tempfile
+import uuid
 from typing import Literal
 
 import gradio as gr
@@ -14,6 +15,7 @@ _POSTHOG_KEY = os.environ.get("POSTHOG_KEY", "")
 _POSTHOG_HOST = os.environ.get("POSTHOG_HOST", "")
 _POSTHOG_ENABLED = bool(_POSTHOG_KEY and _POSTHOG_HOST)
 
+posthog.api_key = _POSTHOG_KEY
 posthog.project_api_key = _POSTHOG_KEY
 posthog.host = _POSTHOG_HOST
 
@@ -128,7 +130,7 @@ def _posthog_distinct_id(api_key: str) -> str:
     return hashlib.sha256(api_key.encode()).hexdigest()[:16]
 
 
-async def run_agent_map(api_key, file, query, effort_label, fields_list):
+async def run_agent_map(api_key, file, query, effort_label, fields_list, session_id):
     if not api_key:
         raise gr.Error("Please enter your everyrow API key.")
     if file is None:
@@ -159,6 +161,7 @@ async def run_agent_map(api_key, file, query, effort_label, fields_list):
             distinct_id=distinct_id,
             event="agent_map_started",
             properties={
+                "$session_id": session_id,
                 "effort_level": effort_label,
                 "row_count": len(df),
                 "column_count": len(df.columns),
@@ -174,7 +177,7 @@ async def run_agent_map(api_key, file, query, effort_label, fields_list):
             posthog.capture(
                 distinct_id=distinct_id,
                 event="agent_map_failed",
-                properties={"error": str(result.error), "app": "everyrow-research-space"},
+                properties={"$session_id": session_id, "error": str(result.error), "app": "everyrow-research-space"},
             )
         raise gr.Error(f"agent_map failed: {result.error}")
 
@@ -183,6 +186,7 @@ async def run_agent_map(api_key, file, query, effort_label, fields_list):
             distinct_id=distinct_id,
             event="agent_map_completed",
             properties={
+                "$session_id": session_id,
                 "output_rows": len(result.data),
                 "output_columns": len(result.data.columns),
                 "app": "everyrow-research-space",
@@ -290,6 +294,7 @@ with gr.Blocks(
         "*Define the structured fields you want the AI to annotate for each row. Leave empty to return a single answer column.*"
     )
 
+    session_id = gr.State(lambda: str(uuid.uuid4()))
     fields_state = gr.State([])
 
     @gr.render(inputs=fields_state)
@@ -440,7 +445,7 @@ with gr.Blocks(
         submit_btn = gr.Button("Run", variant="primary")
 
         # Submit: read name/desc/opts from components for freshest values
-        async def on_submit(api_key_val, file_val, query_val, effort_val, *dynamic_vals):
+        async def on_submit(api_key_val, file_val, query_val, effort_val, session_id_val, *dynamic_vals):
             names = dynamic_vals[:n]
             descs = dynamic_vals[n:2 * n]
             opts_vals = list(dynamic_vals[2 * n:])
@@ -458,7 +463,7 @@ with gr.Blocks(
                 fields_list.append(entry)
             try:
                 result_df, download_update = await run_agent_map(
-                    api_key_val, file_val, query_val, effort_val, fields_list
+                    api_key_val, file_val, query_val, effort_val, fields_list, session_id_val
                 )
                 has_research = "research" in result_df.columns
                 return (
@@ -484,7 +489,7 @@ with gr.Blocks(
 
         submit_btn.click(
             fn=on_submit,
-            inputs=[api_key, file, query, effort] + all_text_inputs,
+            inputs=[api_key, file, query, effort, session_id] + all_text_inputs,
             outputs=[error_box, full_results_state, output_table, download_btn, research_toggle],
         )