feat: improve store_trace_reason with extract parameter store_trace_reason() used embedded code to extract reason based on the location passed to the function. This change adds support for extract keyword that is a Python expression eval'ed when the underlying function/method is called. All callers now set the extract parameter. The prior embedded code has been removed from store_trace_reason(). Failure to eval the expression results in an roundup.logcontext error severity log. Also updated docs. Also replaced env['REQUEST_URI'] with env['PATH_INFO'] for web based entry points as REQUEST_URI isn't documented as a required key and some other front end (e.g. zope, cgi) might not supply this.

# Get newest versions, but specify minimum versions to get versions
# without known vulnerabilities as reported by:
# https://tools.simonwillison.net/python-vulnerability-lookup

# setuptools required for installation - missing from newer base images
setuptools >= 78.1.1
# human timezones
pytz
# indexer
Whoosh
# xapian is also installed
# extra database support
psycopg2
mysqlclient
redis >= 4.5.4
# encryption
gpg
# java web tokens
PyJWT >= 2.12.0
# extra HTTP compression methods
Brotli >= 1.2.0
zstd >= 1.5.4
# jinja2 template engine
Jinja2 >= 3.1.6