fix: Set explicit PLAYWRIGHT_BROWSERS_PATH to fix browser installation (#765)

* fix: Set explicit PLAYWRIGHT_BROWSERS_PATH to fix browser installation

Fixes Playwright browser not found error during web crawling.

The issue was introduced in the uv migration (9f22659) where the
browser installation path was not explicitly set as a persistent
environment variable.

Changes:
- Add ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
- Add --with-deps flag to playwright install command
- Add comprehensive root cause analysis document

Without this fix, Playwright installed browsers to a default location
at build time but couldn't find them at runtime, causing crawling
operations to fail with "Executable doesn't exist" errors.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

* fix: Remove --with-deps flag to prevent build conflicts

The --with-deps flag was causing build failures on some systems because:
- We already manually install all Playwright dependencies (lines 26-49)
- --with-deps attempts to reinstall these packages
- This causes package conflicts and build failures on Windows/WSL

The core fix (ENV PLAYWRIGHT_BROWSERS_PATH) remains the same.

* Delete PLAYWRIGHT_FIX_ANALYSIS.md

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Cole Medin <cole@dynamous.ai>

python/Dockerfile.server

@@ -53,6 +53,7 @@ COPY --from=builder /venv /venv
 
 # Install Playwright browsers
 ENV PATH=/venv/bin:$PATH
+ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
 RUN playwright install chromium
 
 # Copy server code and tests