Fix: detect and surface SSL certificate errors in tracking hook

[valenvivaldi]

Problem

On macOS with a fresh Python install, the SSL certificate store is not configured. This causes all tracking hook calls to silently fail with CERTIFICATE_VERIFY_FAILED — no error visible to the user, tracking just stops working.

Solution

• Detect SSL errors specifically in the except block of tracking.sh
• Write ~/.fyso/ssl-error.log with platform-specific fix instructions (macOS + generic pip)
• Warn early on subsequent hook runs: if ssl-error.log exists, print a visible stderr message and exit before doing any work
• Users clear the flag (rm ~/.fyso/ssl-error.log) after fixing to re-enable tracking

Behavior after this fix

First SSL failure writes:

~/.fyso/ssl-error.log
  [2026-03-31T...Z] SSL error: ...
  Fix on macOS:
    open /Applications/Python 3.*/Install Certificates.command
  Fix on any OS:
    pip install --upgrade certifi
  After fixing, delete this file to re-enable tracking:
    rm ~/.fyso/ssl-error.log

Subsequent hook runs print to stderr:

[fyso] SSL certificate error detected. Tracking is disabled.
[fyso] Fix: open /Applications/Python 3.*/Install Certificates.command
[fyso] Then delete ~/.fyso/ssl-error.log to re-enable tracking.