v0.10.0 — Graph Timing: heat map + critical path highlight

[ddsha441981]

What

Brings WireDoctor's core value — startup timing analysis — directly into the Graph tab.

• Timing heat chip — node color (green→red, log scale) + size mapped to per-bean instantiation time; off by default, cycle/ghost/proxy/orphan colors keep priority
• Critical path chip — traces the startup critical path in gold, dims the rest; handles condensed [cycle: a, b] entries; hidden when no timing data
• Inspector — shows Instantiation: N ms + on critical path tag
• beanTimings JSON field — full per-bean timing map serialized (previously only thresholded slowBeans)
• Version 0.10.0 in all poms; CHANGELOG + report-tour docs; sample/test2 refreshed with a real start.spring.io v0.10.0 report (390 beans, 386 timed)

Verification

• 234 tests green (223 autoconfigure + 11 actuator)
• Real run: start.spring.io (390 beans) — heat + cp chips verified, no JS console errors (headless chromium click-test)