Add 6 new analysis pages and 5 CLI reports

New web UI pages with Plotly charts:
- /sources: cross-source comparison (ratings, categories by standards body)
- /false-positives: profiling of 73 false positives (box plots, terms)
- /trends: temporal evolution (submissions, ratings, safety ratio over time)
- /complexity: draft complexity matrix (correlations, scatter plots)
- /idea-analysis: idea novelty deep dive (sunburst, distribution, shared ideas)
- /citations: enhanced with influence analysis and BCP dependency tabs

New CLI reports (ietf report <name>):
- sources, false-positives, citations, complexity, idea-analysis

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

data/reports/sources.md

@@ -1,5 +1,5 @@
 # Cross-Source Comparison Report
-*Generated 2026-03-08 18:04 UTC — 761 drafts across 6 sources*
+*Generated 2026-03-08 19:32 UTC — 761 drafts across 6 sources*
 
 ## Summary