Fix blog accuracy and add methodology documentation

Blog posts (all 10 files updated):
- Update all counts to match DB: 434 drafts, 557 authors, 419 ideas, 11 gaps
- Fix EU AI Act timeline to August 2026 (5 months, not 18)
- Reframe growth claim from "36x" to actual monthly figures (5→61→85)
- Add safety ratio nuance (1.5:1 to 21:1 monthly variation)
- Fix composite scores (4.8→4.75, 4.6→4.5)
- Add OAuth/GDPR consent distinction (Art. 6(1)(a), Art. 28)
- Add EU AI Act Annex III + MDR context to hospital scenario
- Add FIPA, IEEE P3394, eIDAS 2.0 references
- Add GDPR gap paragraph (DPIA, erasure, portability, purpose limitation)
- Rewrite Post 04 gap table to match actual DB gap names

Methodology:
- Expand methodology.md: pipeline docs, limitations, related work
- Add LLM-as-judge caveats and explicit rating rubric to analyzer.py
- Add clustering threshold rationale to embeddings.py
- Add gap analysis grounding notes to analyzer.py
- Add Limitations section to Post 07

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

data/reports/blog-series/03-oauth-wars.md

@@ -162,7 +162,7 @@ Three structural interventions would accelerate convergence:
 - **Fragmentation goes deeper than protocols**: Chinese and Western blocs build on different RFC foundations (YANG/NETCONF vs COSE/CBOR/CoAP); the only shared bedrock is OAuth 2.0
 - **The missing piece** is a cross-protocol translation layer; no draft in the corpus addresses how agents using different protocols can interoperate
 
-*Next in this series: [What Nobody's Building (And Why It Matters)](04-what-nobody-builds.md) -- The 12 gaps in the IETF's AI agent landscape, and the real-world consequences of leaving them unfilled.*
+*Next in this series: [What Nobody's Building (And Why It Matters)](04-what-nobody-builds.md) -- The 11 gaps in the IETF's AI agent landscape, and the real-world consequences of leaving them unfilled.*
 
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