Extract 55 knowledge articles from BC review-agent prompt

[JesperSchulz]

Adds 55 articles (plus 76 code samples) spanning four new domains and two existing domains, extracted from the internal Business Central review-agent prompt. Content was filtered against BCQuality's remedial-knowledge premise: each article encodes BC-specific behaviour, a CodeCop rule, a platform API semantic, or an anti-false-positive guideline that a capable LLM would otherwise get wrong.

New domains:

• privacy (11 articles): DataClassification inheritance semantics, the StrSubstNo-defeats-Error-telemetry-classification pitfall, Privacy Notice consent for outgoing requests, anti-false-positives for pages and in-memory data.
• upgrade (11 articles): upgrade-codeunit structure, upgrade-tag lifecycle and registration, protected DB reads, DataTransfer for large datasets, InitValue semantics, enum-ordinal preservation, obsolete-workflow, first-install detection.
• ui (9 articles): caption capitalization by phrase type, tooltip voice, teaching-tip vs tooltip, tour-tip conventions, character limits, banned terms, ampersand handling, title punctuation.
• style (11 articles): label-suffix convention, API page naming, temporary-variable prefix, label properties (Comment/Locked), named invocations, FieldCaption in user messages, OptionCaption pairing, Error-parameter passing, this keyword, required parentheses, file naming.

Gaps in existing domains:

• performance (11 articles): production-scale table catalog (no row counts, per internal-data concern), anti-false-positive for bounded tables, guard-before-Get ordering, redundant-Get-in-OnAfterGetRecord, LockTable in read-only helpers, combined ModifyAll passes, writes in OnAfterGetRecord, SetLoadFields heuristics, temporary-table regressions, FlowField source-table widening, MaintainSQLIndex disabling SIFT.
• security (2 articles): environment-specific hardcoded GUIDs, ValidateTableRelation=false on user input.

All articles use bc-version: [all] (applies to every BC version, per the new schema sentinel). Validator passes with 0 errors / 0 warnings.