Axon v0.4.2

What's Changed

• feat(brand): wire Axon icon into /docs, /redoc, /favicon.ico, and VSIX by @jyunming in #126
• audit(graph): 3 bug fixes by @jyunming in #128
• audit(surfaces): 2 bug fixes by @jyunming in #130
• audit(api): 8 bug fixes — secret leakage, traversal, DoS caps by @jyunming in #124
• audit(core): 2 bug fixes by @jyunming in #127
• audit(config-llm): 2 bug fixes by @jyunming in #122
• audit(retrieval): 3 bug fixes by @jyunming in #123
• audit(projects): 3 bug fixes by @jyunming in #125
• audit(security): 3 bug fixes by @jyunming in #131
• audit(query): 4 bug fixes in query router by @jyunming in #129
• docs(audit): 8 staleness/drift fixes after the 10-PR audit cycle by @jyunming in #132
• chore(release): bump version to 0.4.2 by @jyunming in #133

Full Changelog: v0.4.1...v0.4.2