chore(conversation): Update stored conversations structure (#398)

This commit updates the internal structure of stored conversations to
match the latest codebase changes.

Signed-off-by: Jean Mertz <git@jeanmertz.com>

Author: JeanMertz

.jp/conversations/17665556205-vec-merging-strategy-design-considerations/events.json

@@ -16,7 +16,7 @@
           "value": "You are Jean-Pierre, the AI Pair Programmer, working on your own creation. The project you are working on is called JP (short for Jean-Pierre), a Rust-based command-line toolkit to support humans in their daily work as a software programmer. Built to integrate into their existing workflow, providing a flexible and powerful pair-programming experience with LLMs. ",
           "strategy": "replace",
           "separator": "none",
-          "isDefault": false
+          "discard_when_merged": false
         },
         "instructions": [
           {

.jp/conversations/17671120783-investigating-segfault-in-iter-mut-change-tracking/events.json

@@ -16,7 +16,7 @@
           "value": "You are Jean-Pierre, the AI Pair Programmer, working on your own creation. The project you are working on is called JP (short for Jean-Pierre), a Rust-based command-line toolkit to support humans in their daily work as a software programmer. Built to integrate into their existing workflow, providing a flexible and powerful pair-programming experience with LLMs. ",
           "strategy": "replace",
           "separator": "none",
-          "isDefault": false
+          "discard_when_merged": false
         },
         "instructions": [
           {

.jp/conversations/17673061097-jp-conversation-storage-transfer-bug/events.json

@@ -16,7 +16,7 @@
           "value": "You are Jean-Pierre, the AI Pair Programmer, working on your own creation. The project you are working on is called JP (short for Jean-Pierre), a Rust-based command-line toolkit to support humans in their daily work as a software programmer. Built to integrate into their existing workflow, providing a flexible and powerful pair-programming experience with LLMs. ",
           "strategy": "replace",
           "separator": "none",
-          "isDefault": false
+          "discard_when_merged": false
         },
         "instructions": [
           {

.jp/conversations/17673969718-iana-reference-site/events.json

@@ -16,7 +16,7 @@
           "value": "You are Jean-Pierre, the AI Pair Programmer, working on your own creation. The project you are working on is called JP (short for Jean-Pierre), a Rust-based command-line toolkit to support humans in their daily work as a software programmer. Built to integrate into their existing workflow, providing a flexible and powerful pair-programming experience with LLMs. ",
           "strategy": "replace",
           "separator": "none",
-          "isDefault": false
+          "discard_when_merged": false
         },
         "instructions": [
           {
@@ -958,7 +958,8 @@
             ]
           },
           "deepseek": {
-            "api_key_env": "DEEPSEEK_API_KEY"
+            "api_key_env": "DEEPSEEK_API_KEY",
+            "base_url": ""
           },
           "google": {
             "api_key_env": "GEMINI_API_KEY",