feat: add pricing sync script and update model prices from OpenRouter (#27)

* fix: pin npm package versions in MCP integration templates

Prevent supply chain attacks by pinning exact versions instead of
using unpinned `npx -y @package` which pulls latest on every run.

23 of 25 integrations pinned. sqlite-mcp and aws skipped (packages
not found on npm registry).

* fix: use stable azure/mcp version instead of beta

* feat: add pricing sync script and update model prices from OpenRouter API

- scripts/sync-pricing.py fetches real-time pricing from OpenRouter
- Updated 64 price fields across 13 provider files
- Run periodically or in CI to keep prices current

providers/chatgpt.toml

@@ -27,8 +27,8 @@ display_name = "GPT-5.3 Codex"
 tier = "frontier"
 context_window = 200000
 max_output_tokens = 65536
-input_cost_per_m = 0.0
-output_cost_per_m = 0.0
+input_cost_per_m = 1.75
+output_cost_per_m = 14.0
 supports_tools = true
 supports_vision = false
 supports_streaming = true
@@ -40,8 +40,8 @@ display_name = "GPT-5.2 Codex"
 tier = "smart"
 context_window = 200000
 max_output_tokens = 65536
-input_cost_per_m = 0.0
-output_cost_per_m = 0.0
+input_cost_per_m = 1.75
+output_cost_per_m = 14.0
 supports_tools = true
 supports_vision = false
 supports_streaming = true
@@ -53,8 +53,8 @@ display_name = "GPT-5.1 Codex"
 tier = "smart"
 context_window = 200000
 max_output_tokens = 65536
-input_cost_per_m = 0.0
-output_cost_per_m = 0.0
+input_cost_per_m = 1.25
+output_cost_per_m = 10.0
 supports_tools = true
 supports_vision = false
 supports_streaming = true
@@ -66,8 +66,8 @@ display_name = "GPT-5.1 Codex Mini"
 tier = "balanced"
 context_window = 200000
 max_output_tokens = 65536
-input_cost_per_m = 0.0
-output_cost_per_m = 0.0
+input_cost_per_m = 0.25
+output_cost_per_m = 2.0
 supports_tools = true
 supports_vision = false
 supports_streaming = true