Modular LaTeX CV: scaffolding, 13 chapters, altacv styling

Replace the monolithic ODT with a modular LaTeX source tree that becomes
the canonical full CV:

- preamble.tex: altacv color/font overrides + compact-row macros
  (\cvrow, \cvgrant, \cvtalk, \cvalum, \cvpub) so dense lists keep
  baseline-aligned dates without the tabularx misalignment the
  custom v1 had.
- cv-full.tex: driver including the 13 chapters in order.
- chapters/*.tex: header, positions, education, grants, teaching,
  examinations, service, talks, collaborators, alumni, publications,
  products (solo-founded flyRoom + Berengar), software.
- tex-vendor/altacv.cls (v1.7.4): vendored, not in TeX Live.
- Makefile: dockerised xelatex build via texlive/texlive:latest,
  with TEXINPUTS=.:./tex-vendor: so the vendored class resolves.

Output: 6-page build/cv-full.pdf (down from 10 in the first pass).

Makefile

@@ -0,0 +1,39 @@
+# Build CV variants to ./build/<name>.pdf using a dockerised XeLaTeX.
+# Run `make` (or `make full`) to build the full CV. Add new targets per variant.
+
+DOCKER_IMAGE := texlive/texlive:latest
+BUILD_DIR    := build
+ENGINE       := xelatex
+
+# Run the container with the current dir mounted. UID:GID match avoids root-owned outputs.
+# TEXINPUTS prepends ./tex-vendor so altacv.cls (vendored) is found.
+DOCKER_RUN = docker run --rm \
+  -u $(shell id -u):$(shell id -g) \
+  -v $(CURDIR):/work \
+  -w /work \
+  -e TEXINPUTS=.:./tex-vendor: \
+  $(DOCKER_IMAGE)
+
+.PHONY: all full clean shell
+all: full
+
+# Pattern rule: build/<name>.pdf is built from <name>.tex by running xelatex twice
+# (twice to settle cross-references / hyperref).
+$(BUILD_DIR)/%.pdf: %.tex preamble.tex $(wildcard chapters/*.tex) | $(BUILD_DIR)
+	$(DOCKER_RUN) $(ENGINE) -interaction=nonstopmode -halt-on-error \
+	    -output-directory=$(BUILD_DIR) $<
+	$(DOCKER_RUN) $(ENGINE) -interaction=nonstopmode -halt-on-error \
+	    -output-directory=$(BUILD_DIR) $<
+
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+
+full: $(BUILD_DIR)/cv-full.pdf
+
+# Drop into an interactive TeX-Live shell (handy for debugging).
+shell:
+	docker run --rm -it -u $(shell id -u):$(shell id -g) \
+	    -v $(CURDIR):/work -w /work $(DOCKER_IMAGE) bash
+
+clean:
+	rm -rf $(BUILD_DIR)