[dwolfson]

Bumps pyegeria to 6.2.17 (pyproject.toml and uv.lock only).

Ships:

• Resolve analytic functions by registry name or allowed module prefix (ISSUE-169) #516 (ISSUE-169): report specs may name only registered analytic functions or modules under PYEGERIA_ANALYTIC_MODULE_PREFIXES (default pyegeria, trellis_analytics).
• Add an optional declaration to AnalyticFunctionSpec (ISSUE-170) #517 (ISSUE-170): optional declaration on AnalyticFunctionSpec.
• Say why an analytic result is absent instead of returning it as data (ISSUE-171) #518 (ISSUE-171): not_established/not_applicable results return kind: "absent" with the declared sentence.
• Discover analytic functions and steps from installed packages (ISSUE-172) #519 (ISSUE-172): pyegeria.analytics entry-point group, read lazily.
• docs: analytic function resolution, declarations, absent results and entry points (ISSUE-169..172) #520 and docs(issues): move ISSUE-168..172 to the Appendix ahead of 6.2.17 #521: docs and the issue-file tidy-up.

6.2.17 is not on PyPI yet (checked: 404).

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