Introduces the Career Workspace's bounded data foundation, additive
and backwards-compatible: ApplicationUser.ProfileCvStructureJson
stays the authoritative column every existing read path uses; the new
CareerProfiles/CareerProfileVersions tables mirror it via
ICareerProfileService so future Career Workspace features (variants,
history UI) have real tables to build on rather than starting a
second migration later.
- CareerProfile: one snapshot row per user (Version, ProfileJson).
- CareerProfileVersion: append-only history, one row per save
(upload/rebuild/improve/reprocess/parse), so a profile edit is never
silently lost the way ProfileCvStructureJson overwrites are today.
- Stable item IDs assigned to jobs/education/certifications/projects
on first save and preserved across later saves -- the prerequisite
for CV variants to reference "this job" by identity instead of
array position.
- CvDateNormalizer: best-effort free-string -> "YYYY-MM" parsing for
job/education/certification/project date ranges, kept alongside
(never replacing) the original free-string fields.
- Both SQLite (dev) and MySQL/MariaDB (prod) reconciler dialects,
matching this repo's schema-via-raw-SQL-reconciler convention
rather than EF migrations.
Job tracking is untouched -- this is entirely within the profile/CV
domain per the Career Workspace product boundary.
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